Wikipedia:WikiProject U.S. Roads/Washington/When each route was added to the state highway system

Information is sketchier after 1950, when I don't have most of the state laws and had to rely on other less-reliable sources. --NE2 19:54, 10 March 2008 (UTC)

1-99

 * U.S. Route 2
 * I-5 in Everett to US 97 near Peshastin
 * 1931 as SR 15 (c 35); became PSH 15 in 1937 (c 190); became US 2 in 1970
 * US 97 near Peshastin to SR 28 near Wenatchee
 * 1909 as SR 7 (c 92); became Sunset Highway in 1913 (c 65); became SR 7 in 1915 (c 29); became Sunset Highway in 1919 (c 110); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became US 2 in 1970
 * SR 28 near Wenatchee to I-90 near Spokane
 * 1909 as SR 7 (c 92); became Sunset Highway in 1913 (c 65); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became US 2 in 1970
 * I-90 at Spokane to SR 20 at Newport
 * 1915 as SR 23 (c 53); became Pend Oreille Highway in 1917 (c 75); became SR 6 in 1923 (c 185); became PSH 6 in 1937 (c 190); became US 2 in 1970
 * SR 20 at Newport to Idaho
 * 1937 as PSH 6 (c 190); became US 2 in 1970


 * State Route 3
 * US 101 at Shelton to SR 106 near Belfair
 * 1937 as SSH 14A (c 207); became SR 3 in 1970
 * SR 106 near Belfair to SR 16 near Gorst
 * 1915 as SR 21 (c 164); became Navy Yard Highway in 1919 (c 110); became SR 14 in 1923 (c 185); became PSH 14 in 1937 (c 190); became PSH 21 in 1955 (c 383); became SR 3 in 1970
 * SR 16 near Gorst to Bremerton
 * 1915 as SR 21 (c 164); became Navy Yard Highway in 1919 (c 110); became SR 14 in 1923 (c 185); became PSH 21 in 1937 (c 190); became SR 3 in 1970
 * Bremerton to SR 104 near Port Gamble
 * 1915 as SR 21 (c 164); became PSH 21 in 1937 (c 190); became SR 3 in 1970


 * State Route 4
 * US 101 near Johnson's Landing to I-5 near Kelso
 * 1915 as SR 19 (c 164); became Ocean Beach Highway in 1919 (c 110); became SR 12 in 1923 (c 185); became PSH 12 in 1937 (c 190); became SR 4 in 1970


 * Interstate 5
 * Oregon to SR 167 near Tacoma
 * 1913 as Pacific Highway (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); became I-5 in 1970
 * SR 167 near Tacoma to SR 99 at Fife
 * 1923 as SR 1 (c 185); became PSH 1 in 1937 (c 190); became I-5 in 1970
 * SR 99 at Fife to SR 529 in Marysville
 * Realignment of PSH 1 (see SR 99 for history); became I-5 in 1970
 * SR 529 in Marysville to SR 11 near Burlington
 * 1913 as Pacific Highway (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); became I-5 in 1970
 * SR 11 near Burlington to SR 11 at Bellingham
 * 1931 as SR 1 (c 36); became PSH 1 in 1937 (c 190); became I-5 in 1970
 * SR 11 at Bellingham to Canada
 * 1913 as Pacific Highway (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); became I-5 in 1970


 * State Route 6
 * US 101 at Raymond to I-5 at Chehalis
 * 1913 as National Park Highway (c 65); became Ocean Beach Highway in 1919 (c 110); became SR 12 in 1923 (c 185); became PSH 12 in 1937 (c 190); became SR 6 in 1970


 * State Route 7
 * US 12 near Morton to Alder
 * 1909 as SR 18 (c 92); became National Park Highway in 1913 (c 65); became SR 5 in 1923 (c 185); became PSH 5 in 1937 (c 190); became SR 7 in 1970
 * Alder to I-5 at Tacoma
 * 1913 as National Park Highway (c 65); became SR 5 in 1923 (c 185); became PSH 5 in 1937 (c 190); became SR 7 in 1970


 * State Route 8
 * US 12 near Elma to US 101 near Olympia
 * 1913 as Olympic Highway (c 65); became SR 9 in 1923 (c 185); became PSH 9 in 1937 (c 190); became SR 8 in 1970


 * Former State Route 8 (1964-1967)
 * See US 12


 * State Route 9
 * SR 522 near Woodinville to Canada
 * 1937 as SSH 1A (c 207); became SR 9 in 1970

Former portions:
 * SR 202 near Bothell to SR 522 near Woodinville
 * 1937 as SSH 1A (c 207); deleted in 1965 (ex.s. c 170)


 * State Route 10
 * SR 970 at Teanaway Junction to US 97 near Ellensburg
 * Old alignment of PSH 2 (see I-90 for history); became SR 10 in 1970


 * State Route 11
 * I-5 near Burlington to Blanchard
 * 1913 as Pacific Highway (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); became SR 11 in 1970
 * Blanchard to Skagit-Whatcom County line
 * 1895 as wagon road (c 168); became SR 6 in 1905 (c 7); became Pacific Highway in 1913 (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); became SR 11 in 1970
 * Skagit-Whatcom County line north one mile
 * 1905 as SR 6 (c 7); became Pacific Highway in 1913 (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); became SR 11 in 1970
 * North of Skagit-Whatcom County line to South Bellingham
 * 1913 as Pacific Highway (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); became SR 11 in 1970
 * South Bellingham to I-5 at Bellingham
 * 1967 as SSH 1F (ex.s. c 145); became SR 110 in 1970; became SR 11 in 1975 (c 63)

Former portions:
 * South Bellingham to I-5 near downtown Bellingham
 * 1913 as Pacific Highway (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); became SR 11 in 1970; deleted in 1975 (c 63)


 * U.S. Route 12
 * US 101 at Aberdeen to Montesano
 * 1905 as SR 9 (c 7); became Olympic Highway in 1913 (c 65); became SR 9 in 1923 (c 185); became PSH 9 in 1937 (c 190); became US 12 in 1970
 * Montesano to SR 8 near Elma
 * 1913 as Olympic Highway (c 65); became SR 9 in 1923 (c 185); became PSH 9 in 1937 (c 190); became US 12 in 1970
 * SR 8 near Elma to I-5 near Centralia
 * 1925 as SR 9 (c 26); became PSH 9 in 1937 (c 190); became US 12 in 1970
 * I-5 near Chehalis to Salkum
 * 1913 as National Park Highway (c 65); became SR 5 in 1923 (c 185); became PSH 5 in 1937 (c 190); became US 12 in 1970
 * Salkum to Riffe
 * 1905 as SR 5 (c 7); became National Park Highway in 1913 (c 65); became SR 5 in 1923 (c 185); became PSH 5 in 1937 (c 190); became US 12 in 1970
 * Riffe to SR 7 near Morton
 * 1913 as National Park Highway (c 65); deleted in 1923 (c 185)
 * 1937 as SSH 5L (c 207); became PSH 5 in 1967 (ex.s. c 145); became US 12 in 1970
 * SR 7 near Morton to Kosmos
 * 1909 as SR 18 (c 92); became SR 5 in 1923 (c 185); became PSH 5 in 1937 (c 190); became US 12 in 1970
 * Kosmos to SR 123 near White Pass
 * 1905 as SR 5 (c 7); became PSH 5 in 1937 (c 190); became US 12 in 1970
 * SR 123 near White Pass to SR 410 near Yakima
 * 1931 as SR 5 (c 29); became PSH 5 in 1937 (c 190); became US 12 in 1970
 * SR 410 near Yakima to I-82 at Yakima
 * 1913 as McClellan Pass Highway (c 65); became Naches Pass Highway in 1921 (c 34); became SR 5 in 1923 (c 185); became PSH 5 in 1937 (c 190); became US 12 in 1970
 * I-182 near Pasco to SR 127 near Dodge
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became US 12 in 1970
 * SR 127 near Dodge to Idaho
 * 1913 as First Division of the Eastern Route of the Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became US 12 in 1970


 * Former State Route 12 (1964-1967)
 * See SR 14


 * State Route 14
 * I-5 at Vancouver to Washougal
 * 1913 as SR 8 (c 96); became North Bank Highway in 1919 (c 110); became SR 8 in 1923 (c 185); became PSH 8 in 1937 (c 190); became SR 14 in 1970
 * Washougal to Lyle
 * 1905 as SR 8 (c 7); became North Bank Highway in 1919 (c 110); became SR 8 in 1923 (c 185); became PSH 8 in 1937 (c 190); became SR 14 in 1970
 * Lyle to US 97 near Maryhill
 * 1907 as SR 8 (c 151); became North Bank Highway in 1919 (c 110); became SR 8 in 1923 (c 185); became PSH 8 in 1937 (c 190); became SR 14 in 1970
 * US 97 near Maryhill to SR 221 near Paterson
 * 1937 as SSH 8E (c 207); became PSH 8 in 1943 (c 239); became SR 14 in 1970
 * SR 221 near Paterson to I-82 near Plymouth
 * 1943 as PSH 8 (c 239); became SR 14 in 1970


 * Former State Route 14 (1964-1967)
 * See US 12


 * State Route 16
 * SR 3 near Gorst to Gig Harbor
 * 1923 as SR 14 (c 185); became PSH 14 in 1937 (c 190); became SR 16 in 1970
 * Gig Harbor to Tacoma Narrows
 * 1937 as SSH 14C (c 207); became PSH 14 in 1939 (c 5); deleted in 1949 (c 225)
 * 1951 as PSH 14 (c 8); became SR 16 in 1970
 * Tacoma Narrows Bridge
 * 1939 as PSH 14 (c 5); deleted in 1949 (c 225)
 * 1951 as PSH 14 (c 8); became SR 16 in 1970
 * Tacoma Narrows to I-5 at Tacoma
 * 1951 as PSH 14 (c 8); became SR 16 in 1970


 * State Route 17
 * US 395 to Road 170 near Mesa
 * 1951 as SSH 11G (c 273); became SR 17 in 1970
 * Road 170 near Mesa to SR 260 near Connell
 * 1937 as SSH 11A (c 207); became SR 17 in 1970
 * SR 260 near Connell to SR 28 near Soap Lake
 * 1951 as SSH 11G (c 273); became SR 17 in 1970
 * SR 28 near Soap Lake to US 2 near Coulee City
 * 1937 as PSH 7 (c 190); became SR 17 in 1970
 * US 2 near Coulee City to SR 173 at Bridgeport
 * 1931 as SR 10 (c 31); became PSH 10 in 1937 (c 190); became SR 17 in 1970
 * SR 173 at Bridgeport to US 97 near Brewster
 * 1951 as PSH 10 (c 273); became SR 17 in 1970


 * State Route 18
 * SR 99 near Tacoma to SR 167 near Auburn
 * 1931 as SR 5 (c 29); became PSH 5 in 1937 (c 190); also 1949 as PSH 2 (c 225); deleted from PSH 5 in 1959 (c 319); became SR 18 in 1970
 * SR 167 near Auburn to I-90 near North Bend
 * 1949 as PSH 2 (c 225); became SR 18 in 1970


 * State Route 19
 * SR 104 near Port Ludlow to SR 20 near Old Fort Townsend
 * 1991 as SR 19 (c 342)


 * State Route 20
 * US 101 near Discovery Bay to Port Townsend
 * 1923 as SR 9 (c 185); became PSH 9 in 1937 (c 190); became SR 113 in 1970; became SR 20 in 1973 (1st ex.s. c 151)
 * Port Townsend to Keystone
 * 1994 as SR 20 (c 209)
 * Keystone to SR 525 near Keystone
 * 1950s as SSH 1D; became SR 113 in 1970; became SR 20 in 1973 (1st ex.s. c 151)
 * SR 525 near Keystone to north of Oak Harbor
 * 1937 as SSH 1D (c 207); became SR 525 in 1970; became SR 20 in 1973 (1st ex.s. c 151)
 * North of Oak Harbor to south of Anacortes
 * 1909 as SR 17 (c 61); deleted in 1919 (c 110)
 * 1937 as SSH 1D (c 207); became SR 525 in 1970; became SR 20 in 1973 (1st ex.s. c 151)
 * South of Anacortes to SR 20N near Anacortes
 * 1937 as SSH 1D (c 207); became SR 525 in 1970; became SR 20 in 1973 (1st ex.s. c 151)
 * SR 20N near Anacortes to SR 536 at Fredonia
 * 1937 as PSH 1 (c 190); became SR 536 in 1970; became SR 20 in 1973 (1st ex.s. c 151)
 * SR 536 at Fredonia to I-5 near Burlington
 * 1937 on Josh Wilson Road as SSH 1C (c 207); moved to SR 20 in 1943 (c 212/239); became PSH 16 in 1961 (ex.s. c 21); became SR 20 in 1970
 * I-5 near Burlington to SR 9 at Sedro Woolley
 * 1937 on Cook Road, SR 11 to SR 9, as SSH 1F (c 207); moved to SR 20 in 1953 (c 280); became PSH 16 in 1961 (ex.s. c 21); became SR 20 in 1970
 * SR 9 at Sedro Woolley to Marblemount
 * 1937 as SSH 17A (c 207); became PSH 16 in 1961 (ex.s. c 21); became SR 20 in 1970
 * Marblemount to Mazama
 * 1949 as PSH 17 (c 225) (PSH 17 was formerly further south on the Cascade Wagon road); became PSH 16 in 1961 (ex.s. c 21); became SR 20 in 1970
 * Mazama to SR 153 near Twisp
 * 1905 as SR 12 (c 174); became Roosevelt Highway in 1919 (c 79); became Methow Valley Highway in 1923 (c 185); became PSH 16 in 1937 (c 190); became SR 20 in 1970
 * SR 153 near Twisp to US 97 near Okanogan
 * 1949 as PSH 16 (c 225); became SR 20 in 1970
 * US 97 near Tonasket to SR 21 at Republic
 * 1899 as wagon road (123); became SR 4 in 1905 (c 7); became PSH 4 in 1937 (c 190); became SR 30 in 1970; became SR 20 in 1973 (1st ex.s. c 151)
 * SR 21 at Republic to US 395 near Kettle Falls
 * 1907 as SR 13 (c 151); deleted in 1915 (c 164)
 * 1953 as SSH 3P (c 280); became SR 30 in 1970; became SR 20 in 1973 (1st ex.s. c 151)
 * US 395 at Colville to SR 31 at Tiger
 * 1905 as SR 2 (c 7) - but note that until 1907 (c 151) it took a more northerly route; deleted in 1915 (c 164)
 * 1937 as SSH 6A (c 207); became SR 294 in 1970; became SR 20 in 1973 (1st ex.s. c 151)
 * SR 31 at Tiger to US 2 at Newport
 * 1905 as SR 2 (c 7); deleted in 1915 (c 164)
 * 1921 as Pend Oreille Highway?; became SR 6 in 1923 (c 185); became PSH 6 in 1937 (c 190); became SR 31 in 1970; became SR 20 in 1973 (1st ex.s. c 151)


 * State Route 20 North
 * Lopez Island, Shaw Island, Orcas Island, and Friday Harbor to Anacortes
 * 1994 as SR 20N (c 209)
 * Anacortes to SR 20 near Anacortes
 * 1937 as PSH 1 (c 190); became SR 536 in 1970; became SR 20N in 1973 (1st ex.s. c 151)


 * State Route 21
 * SR 260 in Kahlotus to US 395 near Lind
 * 1983 as SR 21 (c 79)
 * US 395 near Lind to US 2 near Wilbur
 * 1937 as SSH 4B (c 207); became SR 21 in 1970
 * US 2 at Wilbur to Columbia River
 * 1909 as SR 4 (c 92); became PSH 4 in 1937 (c 190); became SR 21 in 1970
 * Columbia River to SR 20 at Republic
 * 1899 as wagon road (123); became SR 4 in 1905 (c 7); became PSH 4 in 1937 (c 190); became SR 21 in 1970
 * SR 20 near Republic to Canada
 * 1937 as SSH 4A (c 207); became SR 21 in 1970


 * State Route 22
 * I-82 near Buena to US 97 at Toppenish
 * 1919 as North Bank Highway (c 110); became SR 8 in 1923 (c 185); became PSH 8 in 1937 (c 190); became SR 22 in 1970
 * US 97 at Toppenish to I-82 at Prosser
 * 1937 as SSH 3A (c 207); became SR 22 in 1970


 * State Route 23
 * US 195 near Colfax to SR 230 near Ewan
 * 1937 as SSH 11C (c 207); became PSH 18 in 1943 (c 239); became SR 23 in 1970
 * SR 230 near Ewan to I-90 at Sprague
 * 1937 as SSH 11C (c 207); became PSH 18 in 1953 (c 285); became SR 23 in 1970
 * I-90 at Sprague to SR 28 at Harrington
 * 1937 as SSH 11F (c 207); became SR 23 in 1970


 * State Route 24
 * I-82 at Yakima to SR 240 near Cold Creek
 * 1937 as SSH 11A (c 207); became SR 24 in 1970
 * SR 240 near Cold Creek to SR 26 near Othello
 * 1937 as SSH 11A (c 207); relocated north in the 1960s; became SR 24 in 1970


 * State Route 25
 * US 2 at Davenport to US 395 near Kettle Falls
 * 1915 as SR 22 (c 164); became PSH 22 in 1937 (c 190); became SR 25 in 1970
 * US 395 near Kettle Falls to SR 251 at Northport
 * 1913 as Inland Empire Highway (c 65); deleted in 1915 (c 164)
 * 1931 as SR 22 (c 37); became PSH 22 in 1937 (c 190); became SR 25 in 1970
 * SR 251 at Northport to Canada
 * 1937 as PSH 22 (c 190); became SR 25 in 1970


 * State Route 26
 * I-90 near Vantage to US 395
 * 1951 as SSH 7C (c 273); became SR 26 in 1970
 * US 395 to SR 260 at Washtucna
 * 1957 as SSH 7C (c 172); became SR 26 in 1970
 * SR 260 at Washtucna to SR 127 near Dusty
 * 1937 as SSH 11B (c 207); became SR 26 in 1970
 * SR 127 near Dusty to US 195 near Colfax
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became SR 127 in 1970; became SR 26 in 1979 (ex.s. c 33)


 * State Route 27
 * US 195 near Pullman to SR 271 near Oakesdale
 * 1913 as Second Division of the Eastern Route of the Inland Empire Highway (c 65); became PSH 3 in 1937 (c 190); became SR 27 in 1970
 * SR 271 near Oakesdale to I-90 near Millwood
 * 1937 as SSH 3H (c 207); became SR 27 in 1970
 * I-90 to SR 290 near Millwood
 * 1991 as SR 27 (c 342)


 * State Route 28
 * US 2 near Wenatchee to SR 281 at Quincy
 * 1915 as Sunset Highway (c 29); became Chelan and Okanogan Highway in 1919 (c 110); became SR 10 in 1923 (c 185); became PSH 10 in 1937 (c 190); became SR 28 in 1970
 * SR 281 at Quincy to US 2 at Davenport
 * 1915 as North Central Highway (c 164); became SR 7 in 1923 (c 185); became PSH 7 in 1937 (c 190); became SR 28 in 1970


 * Former State Route 30 (1964-1973)
 * See SR 20


 * State Route 31
 * SR 20 at Tiger to Canada
 * 1921 as Pend Oreille Highway?; became SR 6 in 1923 (c 185); became PSH 6 in 1937 (c 190); became SR 31 in 1970


 * State Route 35
 * Oregon to SR 14 near White Salmon
 * 1997 as SR 35 (c 308)


 * State Route 41
 * US 2 in Newport to Idaho
 * 1959 as PSH 6 (c 319); became US 2 in 1970; became SR 41 in 1997 (c 155)


 * Interstate 82
 * I-90 near Ellensburg to I-182 near Goose Gap
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became I-82 in 1970
 * I-182 near Goose Gap to US 395 at Kennewick
 * 1965 as PSH 3 (ex.s. c 170)??; became I-82 in 1970
 * US 395 at Kennewick to SR 14 near Plymouth
 * 1943 as PSH 8 (c 239); became SR 14 in 1970; became I-82 in 1985 (c 177)
 * SR 14 near Plymouth to Oregon
 * 1965 as PSH 3 (ex.s. c 170)??; became I-82 in 1970; also became SR 143 in 1973 (1st ex.s. c 151); SR 143 deleted in 1985 (c 177)


 * Interstate 90
 * I-5 to SR 900 in Seattle
 * 1969 as PSH 2 (ex.s. c 281)??; became I-90 in 1970
 * SR 900 in Seattle to SR 900 near Issaquah
 * 1939 as PSH 2 (c 5); became I-90 in 1970
 * SR 900 near Issaquah to North Bend
 * 1909 as SR 7 (c 92); became Sunset Highway in 1913 (c 65); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became I-90 in 1970
 * North Bend to Easton
 * 1899 as wagon road (c 57); became SR 7 in 1905 (c 7); became Sunset Highway in 1913 (c 65); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became I-90 in 1970
 * Easton to SR 970 near Cle Elum
 * 1909 as SR 7 (c 92); became Sunset Highway in 1913 (c 65); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became I-90 in 1970
 * SR 970 near Cle Elum to I-82 near Ellensburg
 * 1913 as Inland Empire Highway (c 65); became Sunset Highway in 1915 (c 29); became Sunset Highway Southern Division in 1919 (c 110); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became I-90 in 1970
 * I-82 near Ellensburg to SR 281 near George
 * 1915 as Sunset Highway (c 29); became North Central Highway in 1919 (c 110); became SR 7 in 1923 (c 185); became PSH 7 in 1937 (c 190); became I-90 in 1970
 * SR 281 near George to US 395 at Ritzville
 * 1937 as PSH 18 (c 190); became I-90 in 1970
 * US 395 at Ritzville to US 2 near Spokane
 * 1913 as Central Washington Highway (c 65); became SR 11 in 1923 (c 185); became PSH 11 in 1937 (c 190); became I-90 in 1970
 * US 2 near Spokane to Idaho
 * 1909 as SR 7 (c 92); became Sunset Highway in 1913 (c 65); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became I-90 in 1970


 * State Route 92
 * SR 9 near Everett to Granite Falls
 * 1937 as SSH 15A (c 207); became SR 92 in 1970


 * Former U.S. Route 95 (1964-1979)
 * See US 195 and US 195 Spur


 * State Route 96
 * I-5 near Everett to SR 9 near Ree's Corner
 * 1991 as SR 96 (c 342)


 * U.S. Route 97
 * Oregon to SR 14 near Maryhill
 * 1937 as PSH 8 (c 190); became US 97 in 1970
 * SR 14 near Maryhill to Goldendale
 * 1907 as SR 8 (c 151); became North Bank Highway in 1919 (c 110); became SR 8 in 1923 (c 185); became PSH 8 in 1937 (c 190); became US 97 in 1970
 * Goldendale to SR 22 at Toppenish
 * 1913 as SR 8 (c 96); became North Bank Highway in 1919 (c 110); became SR 8 in 1923 (c 185); became PSH 8 in 1937 (c 190); became US 97 in 1970
 * SR 22 at Toppenish to I-82 at Union Gap
 * 1937 as SSH 3A (c 207); became US 97 in 1970
 * I-90 near Ellensburg to SR 970 near Virden
 * 1937 as SSH 2I (c 207); became SR 131 in 1970; became US 97 in 1975 (c 63)
 * SR 970 near Virden to US 2 near Peshastin
 * 1909 as SR 7 (c 92); became Sunset Highway in 1913 (c 65); became SR 7 in 1915 (c 29); became Sunset Highway in 1919 (c 110); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became US 97 in 1970
 * US 2 near Orondo to SR 150 near Chelan
 * 1919 as Chelan and Okanogan Highway (c 110); became SR 10 in 1923 (c 185); became SSH 10D in 1937 (c 207); became SR 151 in 1970; became US 97 in 1987 (c 199)
 * SR 150 to US 97A near Chelan
 * 1959 as SSH 10D (c 319); became SR 151 in 1970; became US 97 in 1987 (c 199)
 * US 97A near Chelan to SR 153 near Pateros
 * 1897 as wagon road (c 115); became SR 10 in 1905 (c 7); became Lake Chelan and Okanogan Highway in 1917 (c 75); became Chelan and Okanogan Highway in 1919 (c 110); became SR 10 in 1923 (c 185); became PSH 10 in 1937 (c 190); became US 97 in 1970
 * SR 153 near Pateros to SR 20 near Okanogan
 * 1905 as SR 10 (c 7); became Lake Chelan and Okanogan Highway in 1917 (c 75); became Chelan and Okanogan Highway in 1919 (c 110); became SR 10 in 1923 (c 185); became PSH 10 in 1937 (c 190); became US 97 in 1970
 * SR 20 near Okanogan to SR 215 near Omak
 * 1967 as PSH 10 (ex.s. c 145); became US 97 in 1970
 * SR 215 near Omak to Riverside
 * 1905 as SR 10 (c 7); became Lake Chelan and Okanogan Highway in 1917 (c 75); became Chelan and Okanogan Highway in 1919 (c 110); became SR 10 in 1923 (c 185); became PSH 10 in 1937 (c 190); became US 97 in 1970
 * Riverside to Canada
 * 1907 as SR 10 (c 151); became Lake Chelan and Okanogan Highway in 1917 (c 75); became Chelan and Okanogan Highway in 1919 (c 110); became SR 10 in 1923 (c 185); became PSH 10 in 1937 (c 190); became US 97 in 1970


 * U.S. Route 97 Alternate
 * US 2 near Olds to SR 150 at Chelan
 * 1897 as wagon road (c 115); became SR 10 in 1905 (c 7); became Lake Chelan and Okanogan Highway in 1917 (c 75); deleted in 1919 (c 110)
 * 1937 as PSH 10 (c 190); became US 97 in 1970
 * SR 150 at Chelan to US 97 near Chelan
 * 1897 as wagon road (c 115); became SR 10 in 1905 (c 7); became Lake Chelan and Okanogan Highway in 1917 (c 75); became Chelan and Okanogan Highway in 1919 (c 110); became SR 10 in 1923 (c 185); became PSH 10 in 1937 (c 190); became US 97 in 1970; became US 97A in 1987 (c 199)


 * State Route 99
 * I-5 at Fife to SR 518 in Tukwila
 * 1923 as SR 1 (c 185); became PSH 1 in 1937 (c 190); became SR 99 in 1970
 * SR 599 near Tukwila to Seattle
 * 1923 as SR 1 (c 185); became PSH 1 in 1937 (c 190); became SR 99 in 1970
 * Seattle to Evergreen Way near Everett
 * 1913 as Pacific Highway (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); became SR 99 in 1970
 * Evergreen Way near Everett to I-5 in Everett
 * 1937 as PSH 1 (c 190); became SR 99 in 1970

Former portions:
 * SR 518 in Tukwila to SR 599
 * 1923 as SR 1 (c 185); became PSH 1 in 1937 (c 190); became SR 99 in 1970; deleted in 2004 (c 205)


 * Former U.S. Route 99 Alternate (1964-1969?)
 * See SR 539

100-199

 * State Route 100
 * US 101 in Ilwaco to Fort Canby
 * 1991 as SR 100 (c 342)


 * U.S. Route 101
 * Oregon to SR 401 at Point Ellice
 * 1963 as PSH 12 (ex.s. c 3)??; became US 101 in 1970
 * SR 401 at Point Ellice to Holman
 * 1923 as SR 12 (c 185); became PSH 12 in 1937 (c 190); became US 101 in 1970
 * Holman to SR 6 at Raymond
 * 1913 as National Park Highway (c 65); became Ocean Beach Highway in 1919 (c 110); became SR 12 in 1923 (c 185); became PSH 12 in 1937 (c 190); became US 101 in 1970
 * SR 6 at Raymond to US 12 at Aberdeen
 * 1915 as SR 20 (c 164); became SR 13 in 1923 (c 185); became PSH 13 in 1937 (c 190); became US 101 in 1970
 * US 12 at Aberdeen to Port Angeles
 * 1905 as SR 9 (c 7) - but note that until 1907 (c 151) it took a more northerly route east of Sappho; became Olympic Highway in 1913 (c 65); became SR 9 in 1923 (c 185); became PSH 9 in 1937 (c 190); became US 101 in 1970
 * Port Angeles to Duckabush
 * 1913 as Olympic Highway (c 65); became SR 9 in 1923 (c 185); became PSH 9 in 1937 (c 190); became US 101 in 1970
 * Duckabush to Hoodsport
 * 1909 as SR 14 (c 61); became Olympic Highway in 1913 (c 65); became SR 9 in 1923 (c 185); became PSH 9 in 1937 (c 190); became US 101 in 1970
 * Hoodsport to I-5 near Olympia
 * 1913 as Olympic Highway (c 65); became SR 9 in 1923 (c 185); became PSH 9 in 1937 (c 190); became US 101 in 1970


 * U.S. Route 101 Alternate
 * US 101 to US 101 near Ilwaco
 * 1937 as PSH 12 (c 190); became US 101A in 1970


 * State Route 102
 * Prison to US 101 near Shelton


 * State Route 103
 * US 101 at Seaview to Ocean Park
 * 1937 as SSH 12A (c 207); became SR 103 in 1970
 * Ocean Park to Leadbetter Point
 * 1991 as SR 103 (c 342)


 * State Route 104
 * US 101 near Discovery Bay to SR 19 near Port Ludlow
 * 1937 as SSH 9E (c 207); became SR 104 in 1970
 * SR 19 near Port Ludlow to Hood Canal
 * 1947 to South Point as SSH 9E (c 232); moved to Shine in 1955 (c 383); became SR 104 in 1970
 * Hood Canal Bridge
 * 1959 as SSH 9E (c 319); became SR 104 in 1970
 * Hood Canal to SR 3 near Port Gamble
 * 1949 as PSH 14 (c 225); became SR 104 in 1970
 * SR 3 near Port Gamble to Kingston
 * 1915 as SR 21 (c 164); became PSH 21 in 1937 (c 190); became SR 104 in 1970
 * Kingston to Edmonds
 * 1994 as SR 104 (c 209)
 * Edmonds to SR 99 near the county line
 * 1937 as SSH 1W (c 207); became SR 104 in 1970
 * SR 99 near the county line to SR 522 near Lake Forest Park
 * 1937 as SSH 2B (c 207); became SR 104 in 1970


 * State Route 105
 * US 101 at Raymond to US 101 at Aberdeen including spur to near Westport
 * 1937 as SSH 13A (c 207); became SR 105 in 1970


 * State Route 106
 * US 101 near Hoodsport to SR 3 near Belfair
 * 1915 as SR 21 (c 164); became Navy Yard Highway in 1919 (c 110); became SR 14 in 1923 (c 185); became PSH 14 in 1937 (c 190); became PSH 21 in 1955 (c 383); became SR 106 in 1970


 * State Route 107
 * US 101 near Artic to US 12 at Montesano
 * 1937 as PSH 9 (c 190); became SR 107 in 1970


 * State Route 108
 * SR 8 near McCleary to US 101 near Shelton
 * 1937 as SSH 9D (c 207); became SR 108 in 1970


 * State Route 109
 * US 101 in Hoquiam to Copalis Beach
 * 1947 as SSH 9C (c 232); became SR 109 in 1970
 * Copalis Beach to Pacific Beach
 * 1937 as SSH 9C (c 207); became SR 109 in 1970
 * Pacific Beach to Quinault Reservation
 * 1947 as SSH 9C (c 232); became SR 109 in 1970
 * Quinault Reservation to US 101 near Queets
 * 1951 as SSH 9C (c 273); became SR 109 in 1970
 * US 101 to SR 109 near Hoquiam
 * 1983 as SR 109 (c 180)


 * State Route 110
 * La Push to US 101 near Forks
 * 1937 as SSH 9B (c 207); deleted in 1955 (c 383)
 * 1991 as SR 110 (c 342)
 * Mora to SR 110
 * 1937 as SSH 9B (c 207); deleted in 1955 (c 383)
 * 1991 as SR 110 (c 342)


 * Former State Route 110 (1967-1975)
 * See SR 11


 * Former State Route 111 (1964-1975)
 * Olympic National Park to US 101 in Port Angeles
 * 1959 as SSH 9G (c 319); became SR 111 in 1970; deleted in 1971 (ex.s. c 73)


 * State Route 112
 * Makah Reservation to SR 113 near Pysht
 * 1955 as SSH 9A (c 383); became SR 112 in 1970
 * SR 113 near Pysht to US 101 near Port Angeles
 * 1937 as SSH 9A (c 207); became SR 112 in 1970


 * State Route 113
 * US 101 near Sappho to SR 112 near Pysht
 * 1937 as SSH 9A (c 207); deleted in 1955 (c 383)
 * 1991 as SR 113 (c 342)


 * Former State Route 113 (1964-1973)
 * See SR 20


 * State Route 115
 * Ocean Shores to SR 109 near Ocean City
 * 1973 as SR 115 (c 60)


 * State Route 116
 * SR 19 near Irondale to Fort Flagler
 * 1991 as SR 116 (c 342)


 * State Route 117
 * US 101 in Port Angeles to port
 * 1991 as SR 117 (c 342)


 * State Route 119
 * US 101 near Hoodsport to Mount Rose
 * 1991 as SR 119 (c 342)


 * Former State Route 120 (1964-1967)
 * See SR 140


 * State Route 121
 * I-5 near Maytown to I-5 near Tumwater
 * 1991 as SR 121 (c 342)

Former portions:
 * US 12 near Rochester to I-5 near Maytown
 * 1937 on Littlerock Road as SSH 1M (c 207); north end moved to Maytown in 1959 (c 319)?; became SR 121 in 1970; deleted in 1991 (c 342)


 * Former State Route 121 (1964-1967)
 * See SR 141


 * State Route 122
 * US 12 near Mayfield Dam to US 12 in Mossyrock
 * 1991 as SR 122 (c 342)


 * Former State Route 122 (1964-1967)
 * See SR 142


 * State Route 123
 * US 12 near White Pass to SR 410 near Chinook Pass
 * 1905 as SR 5 (c 7); became PSH 5 in 1937 (c 190); became SR 123 in 1970


 * State Route 124
 * US 12 near Burbank to Touchet North Road
 * 1951 as SSH 3D (c 273); became SR 124 in 1970
 * Touchet North Road to SR 125 near Prescott
 * 1937 as SSH 3D (c 207); became SR 124 in 1970
 * SR 125 near Prescott to US 12 near Waitsburg
 * 1937 as SSH 3E (c 207); became SR 124 in 1970


 * State Route 125
 * Oregon to US 12 at Walla Walla
 * 1923 as SR 3 (c 185); became PSH 3 in 1937 (c 190); became SR 125 in 1970
 * US 12 at Walla Walla to SR 124 near Prescott
 * 1937 as SSH 3E (c 207); became SR 125 in 1970


 * Former State Route 126 (1964-1992)
 * US 12 near Dayton to US 12 near Pomeroy
 * 1937 as SSH 3L (c 207); became SR 126 in 1970; deleted in 1991 (c 342)


 * State Route 127
 * US 12 near Dodge to SR 26 near Dusty
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became SR 127 in 1970


 * State Route 128
 * US 12 in Clarkston to SR 193
 * 1969 as SSH 3G (ex.s. c 281); became SR 193 in 1970; became SR 128 in 1990 (c 108)
 * SR 193 near Clarkston to Idaho
 * 1990 as SR 128 (c 108)

Former portions:
 * US 12 at Pomeroy to US 12 near Clarkston
 * 1937 as SSH 3K (c 207); became SR 128 in 1970; deleted in 1991 (c 342)


 * State Route 129
 * Oregon to Asotin
 * 1937 as PSH 3 (c 190); became SR 129 in 1970
 * Asotin to US 12 at Clarkston
 * 1923 as SR 3 (c 185); became PSH 3 in 1937 (c 190); became SR 129 in 1970


 * State Route 131
 * Forest to US 12 in Randle
 * 1991 as SR 131 (c 342)


 * Former State Route 131 (1964-1975)
 * See US 97


 * Former State Route 140 (1967-1992)
 * SR 14 at Washougal to SR 14 near Washougal
 * 1937 as SSH 8B (c 207); became SR 140 in 1970; deleted in 1991 (c 342)


 * State Route 141
 * SR 14 near White Salmon to forest
 * 1937 as SSH 8D (c 207); became SR 141 in 1970
 * SR 14 near Underwood to SR 141
 * 1951 as SSH 8D (c 273); became SR 141 in 1970


 * Former State Route 141 (1964-1967)
 * See US 12 (Riffe to Morton)


 * State Route 142
 * SR 14 near Lyle to US 97 near Goldendale
 * 1961 as SSH 8E (ex.s. c 21); became SR 142 in 1970


 * Former State Route 143 (1964-1967)
 * See SR 123


 * Former State Route 143 (1973-1985)
 * See I-82


 * State Route 150
 * Manson to US 97A at Chelan
 * 1937 as SSH 10C (c 207); became SR 150 in 1970
 * US 97A at Chelan to US 97 near Chelan
 * 1919 as Chelan and Okanogan Highway (c 110); became SR 10 in 1923 (c 185); became SSH 10D in 1937 (c 207); became SR 151 in 1970; became SR 150 in 1987 (c 199)


 * Former State Route 151 (1964-1987)
 * See US 97, SR 150


 * State Route 153
 * US 97 near Pateros to SR 20 near Twisp
 * 1897 as wagon road (c 115); became SR 12 in 1905 (c 174); became Roosevelt Highway in 1919 (c 79); became Methow Valley Highway in 1923 (c 185); became PSH 16 in 1937 (c 190); became SR 153 in 1970


 * State Route 155
 * US 2 near Coulee City to Grand Coulee Dam
 * 1937 as SSH 2F (c 207); became SR 155 in 1970
 * Grand Coulee Dam to SR 215 at Omak
 * 1937 as SSH 10A (c 207); became SR 155 in 1970

Note: SR 160 was shifted south in 1991 (c 342), back north in 1992 (c 166), and back south in 1993 (c 430), with part of the old route becoming SR 166 in 1993.
 * State Route 160
 * SR 16 near Port Orchard to Harper
 * 1923 as SR 14 (c 185); became PSH 14 in 1937 (c 190); became SR 160 in 1970
 * Harper to Point Southworth
 * 1957 as PSH 14 (c 172); became SR 160 in 1970
 * Point Southworth to Vashon Heights
 * 1994 as SR 160 (c 209)
 * Vashon Heights to Fauntleroy
 * 1994 as SR 160 (c 209)


 * State Route 161
 * SR 7 near La Grande to Eatonville
 * 1967 as SSH 5N (ex.s. c 145); became SR 161 in 1970
 * Eatonville to SR 167 near Puyallup
 * 1955 as SSH 5N (c 383); became SR 161 in 1970
 * SR 167 near Puyallup to SR 18 near Tacoma
 * 1937 as SSH 5D (c 207); became SR 161 in 1970

Former portions:
 * SR 18 to SR 99 near Tacoma
 * 1937 as SSH 5D (c 207); deleted when I-5 opened?


 * State Route 162
 * SR 410 at Sumner to SR 165 near Buckley
 * 1937 as SSH 5E (c 207); became SR 162 in 1970


 * State Route 163
 * SR 16 in Tacoma to Point Defiance
 * 1991 as SR 163 (c 342)
 * Point Defiance to Tahlequah
 * 1994 as SR 163 (c 209)


 * Former State Route 163 (1964-1969?)
 * See SR 167 (Sumner to Auburn)


 * State Route 164
 * SR 18 near Auburn to SR 410 at Enumclaw
 * 1913 as McClellan Pass Highway (c 65); became Naches Pass Highway in 1921 (c 34); became SR 5 in 1923 (c 185); became SR 164 in 1970


 * State Route 165
 * Mount Rainier to SR 410 at Buckley
 * 1931 as SR 5 (c 29); became PSH 5 in 1937 (c 190); became SR 165 in 1970


 * State Route 166
 * SR 16 near Port Orchard to city limits
 * 1993 as SR 166 (c 430); had been part of SR 160


 * State Route 167
 * I-5 near Tacoma to SR 410 at Sumner
 * 1913 as Pacific Highway (c 65); deleted in 1923 (c 185)
 * 1925 as SR 5 (c 26); became PSH 5 in 1937 (c 190); became SR 410 in 1970; became SR 167 in 1973 (1st ex.s. c 151)
 * SR 410 at Sumner to SR 18 near Auburn
 * 1913 as Pacific Highway (c 65); deleted in 1923 (c 185)
 * 1925 as SR 5 (c 26); became PSH 5 in 1937 (c 190); became SR 167 in 1970
 * SR 18 near Auburn to SR 900 near Renton
 * 1913 as Pacific Highway (c 65); became SR 5 in 1923 (c 185); became PSH 5 in 1937 (c 190); became SR 167 in 1970

Former portions:
 * SR 900 near Renton to SR 900 in Seattle
 * 1937 as PSH 5 (c 190); became SR 167 in 1970; deleted in 1991 (c 342)


 * State Route 168
 * SR 410 near Greenwater to SR 410 near Cliffdell
 * 1943 as PSH 5 (c 239); became SR 168 in 1970


 * State Route 169
 * SR 164 at Enumclaw to SR 900 near Renton
 * 1937 as PSH 5 (c 190); became SR 169 in 1970


 * State Route 170
 * SR 17 near Warden to Warden
 * 1967 as SSH 11I (ex.s. c 145); became SR 170 in 1970


 * Former State Route 170 (1964-1967)
 * White Bluffs Ferry to SR 17 near Mesa
 * 1937 as SSH 11A (c 207); deleted in 1967 (ex.s. c 145)


 * State Route 171
 * I-90 to SR 17 near Moses Lake
 * 1959 as SSH 7E (c 319); became SR 171 in 1970
 * SR 17 near Moses Lake to SR 28 near Odessa
 * 1955 as SSH 7E (c 383); became SR 171 in 1970


 * State Route 172
 * US 2 near Waterville to SR 17 near Leahy
 * 1951 as SSH 10B (c 273); became SR 172 in 1970


 * State Route 173
 * SR 17 at Bridgeport to US 97 near Brewster
 * 1931 as SR 10 (c 31); became PSH 10 in 1937 (c 190); became SR 173 in 1970


 * State Route 174
 * SR 17 near Bridgeport to Grand Coulee Dam
 * 1937 as SSH 10B (c 207); became SR 174 in 1970
 * SR 155 at Grand Coulee to Almira Road
 * 1937 as PSH 2 (c 190); deleted in 1955 (c 383)
 * 1961 as SSH 4C (ex.s. c 21); became SR 174 in 1970
 * Almira Road to SR 21 near Wilbur
 * 1937 as SSH 4C (c 207); became SR 174 in 1970
 * SR 174 near Grand Coulee Dam to Crown Point
 * 1955 as SSH 10B (c 383); became SR 174 in 1970


 * State Route 181
 * SR 516 near Kent to I-405 near Tukwila
 * 1937 as SSH 5M (c 207); became SSH 2M in 1959 (c 319); became SR 181 in 1970

Former portions:
 * SR 18 near Auburn to SR 516 near Kent
 * 1937 as SSH 5M (c 207); became SSH 2M in 1959 (c 319); became SR 181 in 1970; deleted in 1991 (c 342)
 * I-405 near Tukwila to SR 599
 * 1937 as SSH 5M (c 207); became SSH 2M in 1959 (c 319); became SR 181 in 1970; deleted in 1979 (ex.s. c 192)
 * SR 599 to Pacific Highway at Duwamish
 * 1937 as SSH 5M (c 207); became SSH 2M in 1959 (c 319); became SR 181 in 1970; deleted in 1971 (ex.s. c 73)
 * Pacific Highway at Duwamish to SR 900 near Seattle
 * 1931 as SR 1 (c 38); apparently not deleted early despite being left out of the PSH 1 description (it's in the 1960 traffic report); became SR 181 in 1970?; deleted in 1971 (ex.s. c 73)?


 * Interstate 182
 * I-82 near Goose Gap to SR 240 at Richland
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became US 12 in 1970; became I-182 in 1971 (ex.s. c 73)
 * SR 240 at Richland to US 395 near Pasco
 * 1971 as I-182 (ex.s. c 73)


 * State Route 193
 * SR 128 near Clarkston to Wilma
 * 1969 as SSH 3G (ex.s. c 281); became SR 193 in 1970

Former portions:
 * Wilma to US 195 near Colton
 * 1969 as SSH 3G (ex.s. c 281); became SR 193 in 1970; deleted in 1991 (c 342)


 * State Route 194
 * Almota to US 195 near Pullman
 * 1991 as SR 194 (c 342)


 * U.S. Route 195
 * Idaho to US 195 Spur
 * 1913 as Second Division of the Eastern Route of the Inland Empire Highway (c 65); became PSH 3 in 1937 (c 190); became US 95 in 1970; became US 195 in 1979 (ex.s. c 33)
 * US 195 Spur to SR 27 near Pullman
 * 1913 as Second Division of the Eastern Route of the Inland Empire Highway (c 65); became PSH 3 in 1937 (c 190); became US 195 in 1970
 * SR 27 near Pullman to SR 26 near Colfax
 * 1925 as SR 3 (c 26); became PSH 3 in 1937 (c 190); became US 195 in 1970
 * SR 26 near Colfax to I-90 at Spokane
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became US 195 in 1970


 * U.S. Route 195 Spur
 * US 195 to Idaho
 * 1937 as PSH 3 (c 190); became US 95 in 1970; became US 195 in 1979 (ex.s. c 33)


 * U.S. Route 197
 * Oregon to SR 14 near The Dalles
 * 1973 as US 197 (1st ex.s. c 151)

200-499

 * State Route 202
 * SR 522 near Bothell to I-90 near North Bend
 * 1925 as SR 2 (c 26); became PSH 2 in 1937 (c 190); became SR 202 in 1970


 * Former State Route 202 (1964-1970?)
 * See SR 522


 * State Route 203
 * SR 202 at Fall City to US 2 at Monroe
 * 1937 as SSH 15B (c 207); became SR 203 in 1970


 * State Route 204
 * US 2 to SR 9 near Everett
 * 1937 as SSH 15A (c 207); became SR 204 in 1970


 * Interstate 205
 * Oregon to I-5 near Vancouver
 * 1961 as PSH 1 (ex.s. c 21); became I-205 in 1970


 * State Route 206
 * US 2 near Mead to Mount Spokane
 * became SR 206 in 1970


 * State Route 207
 * US 2 near Winton to SR 209 near Lake Wenatchee
 * 1937 as SSH 15C (c 207); became SR 207 in 1970

Former portions:
 * SR 209 near Lake Wenatchee to Telma
 * 1937 as SSH 15D (c 207); became SR 207 in 1970; deleted in 1991 (c 342)


 * Former State Route 209 (1964-1992)
 * US 2 at Leavenworth to SR 207 near Lake Wenatchee
 * 1937 as SSH 15C (c 207); became SR 209 in 1970; deleted in 1991 (c 342)


 * State Route 211
 * US 2 near Newport to SR 20 at Usk
 * 1937 as SSH 6B (c 207); became SR 311 in 1970; became SR 211 in 1975 (c 63)


 * State Route 213
 * US 97 near Malott to SR 20 near Okanogan
 * 1959 as PSH 16 (c 319); became SR 20 in 1970; became SR 213 in 1973 (1st ex.s. c 151)


 * State Route 215
 * SR 20 near Okanogan to US 97 near Omak
 * 1905 as SR 10 (c 7); became Lake Chelan and Okanogan Highway in 1917 (c 75); became Chelan and Okanogan Highway in 1919 (c 110); became SR 10 in 1923 (c 185); became PSH 10 in 1937 (c 190); became SSH 16A in 1967 (ex.s. c 145); became SR 20 in 1970; became SR 215 in 1973 (1st ex.s. c 151)


 * Former State Route 220 (1964-1992)
 * Fort Simcoe to White Swan
 * 1957 as SSH 3B (c 172); became SR 220 in 1970; deleted in 1991 (c 342)
 * White Swan to US 97 near Toppenish
 * 1937 as SSH 3B (c 207); became SR 220 in 1970; deleted in 1991 (c 342)
 * US 97 to SR 22 near Toppenish
 * 1971 as SR 220 (ex.s. c 73); deleted in 1991 (c 342)


 * State Route 221
 * SR 14 near Paterson to SR 22 near Prosser
 * 1937 as SSH 8E (c 207); became PSH 8 in 1953 (c 280); became SR 221 in 1970


 * State Route 223
 * SR 22 near Toppenish to US 12 near Granger
 * 1963 as SSH 3T (ex.s. c 3); became SR 223 in 1970


 * State Route 224
 * I-82 at Kiona to SR 240 at Richland
 * 1955 as SSH 3R (c 383); became SR 224 in 1970


 * State Route 225
 * SR 224 in Kiona to SR 240 near Horn Rapids Dam
 * 1991 as SR 225 (c 342)


 * State Route 230
 * I-90 near Ritzville to SR 23 near Ewan
 * 1943 as PSH 18 (c 239); became SR 230 in 1970


 * State Route 231
 * SR 23 near Sprague to US 2 near Reardan
 * 1937 as SSH 2G (c 207); became SR 231 in 1970
 * US 2 near Reardan to Long Lake
 * 1963 as SSH 3J (ex.s. c 3); became SR 231 in 1970
 * Long Lake to SR 292 at Springdale
 * 1937 as SSH 3J (c 207); became SR 231 in 1970
 * SR 292 at Springdale to US 395 near Chewelah
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became SSH 3J in 1957 (c 172); became SR 231 in 1970


 * Former State Route 232 (1967-1992)
 * SR 231 to US 395 near Valley
 * 1967 as SSH 3U (ex.s. c 145); became SR 232 in 1970; deleted in 1991 (c 342)


 * Former State Route 237 (1975-1992)
 * SR 20 near Whitney to SR 11 near Blanchard
 * 1937 as SSH 1C (c 207); became SR 537 in 1970; became SR 237 in 1975 (c 63); deleted in 1991 (c 342)


 * State Route 240
 * SR 24 near Cold Creek to SR 224 at Richland
 * 1961 as SSH 11C (ex.s. c 21); became SR 240 in 1970
 * SR 224 to I-182 at Richland
 * 1953 as SSH 3R (c 280); became SR 240 in 1970
 * I-182 at Richland to US 395 at Kennewick
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became US 12 in 1970


 * State Route 241
 * SR 22 in Mabton to I-82 near Sunnyside
 * 1991 as SR 241 (c 342)
 * I-82 near Sunnyside to SR 24 near Cold Creek
 * 1967 as SSH 3V (ex.s. c 145); became SR 241 in 1970


 * State Route 243
 * SR 24 near the Columbia River to SR 26 near Vantage
 * 1957 as SSH 7C (c 172); became SR 243 in 1970


 * Former State Route 251 (1964-1983)
 * SR 25 at Northport to Canada
 * 1913 as Inland Empire Highway (c 65); deleted in 1915 (c 164)
 * 1931 as SR 22 (c 37); became SSH 22A in 1937 (c 207); became SR 251 in 1970; deleted in 1983 (c 180)


 * State Route 260
 * SR 17 to US 395 near Connell
 * 1937 as SSH 11A (c 207); became SR 260 in 1970
 * US 395 near Connell to SR 26 at Washtucna
 * 1937 as SSH 11B (c 207); became SR 260 in 1970


 * State Route 261
 * US 12 at Delaney to SR 260 near McAdam
 * 1957 as SSH 11B (c 172); became SR 261 in 1970
 * SR 26 at Washtucna to I-90 at Ritzville
 * 1937 as SSH 11E (c 207); became SR 261 in 1970


 * State Route 262
 * SR 26 near Royal City to SR 17 near Warden
 * 1991 as SR 262 (c 342)


 * State Route 263
 * Windust to SR 260 in Kahlotus
 * 1991 as SR 263 (c 342)


 * State Route 270
 * US 195 at Pullman to Idaho
 * 1937 as PSH 3 (c 190); became SR 270 in 1970


 * State Route 271
 * SR 27 near Oakesdale to US 195 near Rosalia
 * 1913 as Second Division of the Eastern Route of the Inland Empire Highway (c 65); became PSH 3 in 1937 (c 190); became SR 271 in 1970


 * State Route 272
 * US 195 at Colfax to SR 27 at Palouse
 * 1937 as SSH 3F (c 207); became SR 272 in 1970
 * SR 27 at Palouse to Idaho
 * 1937 as PSH 3 (c 190); became SR 272 in 1970


 * State Route 274
 * SR 27 at Tekoa to Idaho
 * 1937 as SSH 3H (c 207); became SR 274 in 1970


 * State Route 276
 * US 195 to SR 270 near Pullman
 * 1973 as SR 276 (1st ex.s. c 151)


 * State Route 278
 * SR 27 in Rockford to Idaho
 * 1991 as SR 278 (c 342)


 * State Route 281
 * I-90 near George to SR 28 at Quincy
 * 1915 as Sunset Highway (c 29); became North Central Highway in 1919 (c 110); became SR 7 in 1923 (c 185); became PSH 7 in 1937 (c 190); became SR 281 in 1970


 * State Route 282
 * SR 28 to SR 17 near Ephrata
 * 1951 as SSH 11G (c 273); became SR 282 in 1970


 * State Route 283
 * SR 281 near George to SR 28 near Ephrata
 * 1949 as PSH 7 (c 225); became SR 283 in 1970


 * State Route 285
 * US 2 in Wenatchee to downtown Wenatchee
 * 1991 as SR 285 (c 342)
 * Downtown Wenatchee to SR 28 in East Wenatchee
 * 1977 as SR 285 (c 224)


 * State Route 290
 * I-90 in Spokane to Idaho
 * 1937 as SSH 2H (c 207); shifted north from Wellesley Avenue in 1967 (ex.s. c 145); became SR 290 in 1970


 * State Route 291
 * US 2 in Spokane to county line
 * 1959 as SSH 3S (c 319); became SR 291 in 1970
 * County line to SR 231 near Little Falls Dam
 * 1983 as SR 291 (c 180)


 * State Route 292
 * SR 231 at Springdale to US 395 near Loon Lake
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became SSH 3J in 1957 (c 172); became SR 292 in 1970


 * Former State Route 294 (1964-1973)
 * See SR 20


 * Former U.S. Route 295 (1964-1967?)
 * See SR 127, SR 26


 * State Route 300
 * Belfair State Park to SR 3 at Belfair
 * 1957 as SSH 21C (c 172); became SR 300 in 1970


 * State Route 302
 * SR 3 near Allyn to SR 16 near Purdy
 * 1937 as SSH 14B (c 207); became SSH 14A in 1955 (c 383); became SR 302 in 1970


 * State Route 303
 * SR 304 at Bremerton to East Bremerton
 * 1961 as SSH 21B (ex.s. c 21); became SR 303 in 1970; Manette Bridge branch deleted in 1991 (c 342)
 * East Bremerton to Brownsville Highway
 * 1937 as SSH 21B (c 207); became SR 303 in 1970
 * Brownsville Highway to SR 3 near Silverdale
 * 1991 as SR 303 (c 342)

Former portions:
 * SR 303 to SR 308 at Keyport (Brownsville Highway)
 * 1937 as SSH 21B (c 207); became SR 303 in 1970; deleted in 1991 (c 342)


 * State Route 304
 * SR 3 in Bremerton to ferry
 * 1961 as PSH 21 (ex.s. c 21); became SR 304 in 1970; deleted in 1991 (c 342)
 * 1993 as SR 304 (c 430)
 * Bremerton to SR 519 in Seattle
 * 1994 as SR 304 (c 209)


 * State Route 305
 * SR 519 in Seattle to Bainbridge Island
 * 1994 as SR 305 (c 209)
 * Bainbridge Island to SR 3 near Poulsbo
 * 1937 as SSH 21A (c 207); south end moved from Port Blakely to Winslow in 1949 (c 225); became SR 305 in 1970


 * Former State Route 306 (1964-1993)
 * SR 303 near East Bremerton to Illahee State Park
 * 1951 as SSH 21B (c 273); became SR 306 in 1970; deleted in 1993 (c 430)


 * State Route 307
 * SR 305 at Poulsbo to SR 104 near Miller Lake
 * 1991 as SR 307 (c 342)


 * State Route 308
 * SR 3 to Keyport
 * 1929 as SR 21 (c 116); became PSH 21 in 1937 (c 190); became SR 303 in 1970; became SR 308 in 1971 (ex.s. c 73)


 * State Route 310
 * SR 3 near Oyster Bay to SR 304 in Bremerton
 * 1991 as SR 310 (c 342)


 * Former State Route 311 (1964-1975)
 * See SR 211


 * State Route 339
 * SR 160 in Vashon Heights to SR 519 in Seattle
 * 1994 as SR 339 (c 209)


 * U.S. Route 395
 * I-82 to SR 240 at Kennewick
 * 1943 as PSH 8 (c 239); became SR 14 in 1970; became US 395 in 1985 (c 177)
 * SR 240 at Kennewick to I-182 at Pasco
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became US 12 in 1970
 * I-182 at Pasco to I-90 at Ritzville
 * 1913 as Central Washington Highway (c 65); became SR 11 in 1923 (c 185); became PSH 11 in 1937 (c 190); became US 395 in 1970
 * US 2 near Spokane to SR 292 near Loon Lake
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became US 395 in 1970
 * SR 292 near Loon Lake to SR 231 near Chewelah
 * 1957 as PSH 3 (c 172); became US 395 in 1970
 * SR 231 near Chewelah to SR 20 at Colville
 * 1913 as Inland Empire Highway (c 65); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became US 395 in 1970
 * SR 20 to Orient
 * 1905 as SR 2 (c 7) - but note that until 1907 (c 151) it took a more northerly route west of Tiger; became Inland Empire Highway in 1915 (c 164); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became US 395 in 1970
 * Orient to Canada
 * 1915 as Inland Empire Highway (c 164); became SR 3 in 1923 (c 185); became PSH 3 in 1937 (c 190); became US 395 in 1970


 * State Route 397
 * Finely to US 395 in Pasco
 * 1991 as SR 397 (c 342); extended slightly south in 1993 (c 430)


 * State Route 401
 * US 101 at Point Ellice to Megler
 * 1923 as SR 12 (c 185); became PSH 12 in 1937 (c 190); became SR 401 in 1970
 * Megler to SR 4 near Naselle
 * 1937 as SSH 12B (c 207); became SR 401 in 1970


 * Former State Route 402 (1964-1971)
 * SR 4 near Grays River to SR 6 near Pe Ell
 * 1959 as SSH 12G (c 319); became SR 402 in 1970; deleted in 1971 (ex.s. c 73)


 * Former State Route 403 (1964-1992)
 * Altoona to SR 4 near Grays River
 * 1937 as SSH 12C (c 207); became SR 403 in 1970; deleted in 1991 (c 342)


 * Interstate 405
 * I-5 near Seattle to SR 167 near Renton
 * 1937 as SSH 1L (c 207); became PSH 1 in 1957 (c 172); became I-405 in 1970
 * SR 167 to SR 900 near Renton
 * 1957 as PSH 1 (c 172); became I-405 in 1970
 * SR 900 near Renton to north of Kirkland
 * 1937 as SSH 2A (c 207); became PSH 1 in 1957 (c 172); became I-405 in 1970
 * North of Kirkland to SR 522 near Woodinville
 * 1937 as SSH 2A (c 207); became PSH 1 in 1963 (ex.s. c 3); became I-405 in 1970
 * SR 522 near Woodinville to I-5 near Seattle
 * 1957 as PSH 1 (c 172); became I-405 in 1970


 * Former State Route 407 (1964-1992)
 * SR 4 near Cathlamet to confluence of Elokomin River
 * 1937 as SSH 12D (c 207); became SR 407 in 1970; deleted in 1991 (c 342)


 * State Route 409
 * Columbia River to SR 4 at Cathlamet
 * 1943 as SSH 12F (c 147); became SR 409 in 1970


 * State Route 410
 * SR 167 at Sumner to SR 165 at Buckley
 * 1937 as PSH 5 (c 190); became SR 410 in 1970
 * SR 165 at Buckley to SR 164 at Enumclaw
 * 1931 as SR 5 (c 29); became PSH 5 in 1937 (c 190); became SR 410 in 1970
 * SR 164 at Enumclaw to Mud Mountain Dam
 * 1913 as McClellan Pass Highway (c 65); became Naches Pass Highway in 1921 (c 34); became SR 5 in 1923 (c 185); became PSH 5 in 1937 (c 190); became SR 410 in 1970
 * Mud Mountain Dam to US 12 near Yakima
 * 1897 as wagon road (c 116); became SR 1 in 1905 (c 7); east of American River became SR 5 in 1907 (c 151); whole route became McClellan Pass Highway including branches to Mount Rainier in 1913 (c 65); deleted branches in 1919 (c 110); became Naches Pass Highway in 1921 (c 34); became SR 5 in 1923 (c 185); became PSH 5 in 1937 (c 190); became SR 410 in 1970


 * State Route 411
 * SR 432 to SR 4 at Longview
 * 1991 as SR 411 (c 342)
 * SR 4 at Longview to I-5 at Castle Rock
 * 1957 as SSH 12H (c 172); became SR 411 in 1970

Former portions:
 * Castle Rock to SR 506 near Vader
 * 1957 as SSH 12H (c 172); became SR 411 in 1970; deleted in 1991 (c 342)


 * Former State Route 431 (1968?-1992)
 * SR 4 to I-5 in Kelso
 * 1963 as PSH 12 (ex.s. c 3); became SR 431 in 1970; deleted in 1991 (c 342)


 * State Route 432
 * SR 4 near Longview to I-5 near Kelso
 * 1937 as PSH 12 (c 190); became SR 432 in 1970; rerouted in 1991 (c 342)


 * State Route 433
 * Oregon to SR 432 in Longview
 * 1965 as PSH 12 (ex.s. c 170)?; became SR 433 in 1970; truncated slightly to new SR 432 in 1991 (c 342)

500-599

 * State Route 500
 * I-5 at Vancouver to SR 14 at Camas
 * 1937 as SSH 8A (c 207); became SR 500 in 1970


 * State Route 501
 * I-5 at Vancouver to I-5 near La Center
 * 1937 as SSH 1T (c 207); shifted west in 1963 (ex.s. c 3); became SR 501 in 1970


 * State Route 502
 * I-5 near Vancouver to SR 503 at Battle Ground
 * 1937 as SSH 1S (c 207); became SR 502 in 1970


 * State Route 503
 * SR 500 at Orchards to SR 502 at Battle Ground
 * 1937 as SSH 1U (c 207); became SR 503 in 1970
 * SR 502 at Battle Ground to near Yale
 * 1937 as SSH 1S (c 207); became SR 503 in 1970
 * Near Yale to I-5 near Woodland
 * 1909 as SR 15; deleted in 1919 (c 110)
 * 1937 as SSH 1S (c 207); became SR 503 in 1970
 * SR 503 near Yale to county line
 * 1909 as SR 15; also extended east in Skamania County to near the east end of Swift Creek Reservoir (c 61); deleted in 1919 (c 110)
 * 1991 as SR 503 (c 342)


 * State Route 504
 * I-5 near Castle Rock to forest boundary
 * 1937 as SSH 1R (c 207); became SR 504 in 1970
 * Forest boundary to Spirit Lake
 * 1961 as SSH 1R (ex.s. c 21); became SR 504 in 1970


 * State Route 505
 * Winlock to I-5 near Toledo
 * 1937 as SSH 12E (c 207); became SR 603 in 1970; became SR 505 in 1991 (c 342)
 * I-5 near Toledo to Toledo
 * 1991 as SR 505 (c 342)
 * Toledo to SR 504 near Toutle
 * 1937 as SSH 1Q (c 207); became SR 505 in 1970

Former portions:
 * I-5 near Toledo to Toledo (Toledo-Vader Road)
 * 1937 as SSH 1Q (c 207); became SSH 1P in 1963 (ex.s. c 3); became SR 505 in 1970; deleted in 1991 (c 342)


 * State Route 506
 * Ryderwood to I-5 near Toledo
 * 1937 as SSH 1P (c 207); became SR 506 in 1970


 * State Route 507
 * I-5 in Centralia to Centralia limit
 * 1959 as SSH 1N (c 319); became SR 507 in 1970
 * Centralia limit to Tenino
 * 1943 as SSH 1N (c 212); became SR 507 in 1970
 * Tenino to SR 7 near Tacoma
 * 1937 as SSH 5H (c 207); became SR 507 in 1970


 * State Route 508
 * I-5 near Chehalis to SR 7 at Morton
 * 1937 as SSH 5K (c 207); became SR 508 in 1970


 * State Route 509
 * I-705 at Tacoma to SR 99 near Redondo
 * 1937 as SSH 1V (c 207); became SR 509 in 1970
 * SR 516 near Des Moines to SR 99 in Seattle
 * 1937 as SSH 1K (c 207); became SR 509 in 1970

Former portions:
 * SR 99 near Redondo to SR 516 near Des Moines
 * 1937 as SSH 1V (c 207); became SR 509 in 1970; deleted in 1991 (c 342)


 * State Route 510
 * I-5 near Lacey to SR 507 at Yelm
 * 1937 as SSH 5I (c 207); west end moved from Tumwater in 1959 (c 319); west end moved again in 1967 (ex.s. c 145); became SR 510 in 1970


 * State Route 512
 * I-5 near Tacoma to SR 167 near Puyallup
 * 1937 as SSH 5G (c 207); became SR 512 in 1970


 * State Route 513
 * SR 520 in Seattle to Sand Point
 * 1937 as SSH 1J (c 207); became SR 513 in 1970

Former portions:
 * Downtown Seattle to SR 520
 * 1937 as SSH 1J (c 207); became SR 513 in 1970; deleted in 1971 (ex.s. c 73)
 * Sand Point to I-5 near Seattle
 * 1937 as SSH 1J (c 207); north end moved from SR 99 to I-5 when I-5 was built; became SR 513 in 1970; deleted in 1991 (c 342)


 * Former State Route 514 (1964-1992)
 * SR 99 to SR 161 near Milton
 * 1937 as SSH 1X (c 207); became SR 514 in 1970; deleted in 1991 (c 342)


 * State Route 515
 * SR 516 near Kent to SR 900 in Renton
 * 1937 as SSH 5C (c 207); became SR 515 in 1970


 * State Route 516
 * SR 509 near Des Moines to SR 99
 * 1937 as SSH 1K (c 207); became SR 516 in 1970
 * SR 99 to SR 169 near Maple Valley
 * 1937 as SSH 5A (c 207); became SR 516 in 1970


 * State Route 518
 * SR 509 near Sunnydale to I-5 near Seattle
 * 1937 as SSH 1L (c 207); became SR 518 in 1970


 * State Route 519
 * I-90 in Seattle to ferry terminal
 * 1991 as SR 519 (c 342)


 * State Route 520
 * I-5 in Seattle to I-405 near Bellevue
 * 1961 as PSH 1 (ex.s. c 21); became SR 520 in 1970
 * I-405 near Bellevue to SR 202 near Redmond
 * 1963 as PSH 1 (ex.s. c 3); became SR 520 in 1970; also became SR 920 east of SR 901 in 1975 (c 63); SR 920 deleted in 1985 (c 177)


 * State Route 522
 * I-5 in Seattle to SR 527 near Bothell
 * 1937 as PSH 2 (c 190); became SR 522 in 1970
 * SR 527 to SR 202 near Bothell
 * 1925 as SR 2 (c 26); became PSH 2 in 1937 (c 190); became SR 522 in 1970
 * SR 202 near Bothell to US 2 near Monroe
 * 1943 as PSH 15 (c 239); became SR 522 in 1970


 * State Route 523
 * SR 99 to SR 522 in Seattle
 * 1991 as SR 523 (c 342)


 * State Route 524
 * SR 104 at Edmonds to SR 527 near Bothell
 * 1957 as SSH 1W (c 172); became SR 524 in 1970
 * SR 527 near Bothell to SR 522 near Maltby
 * 1991 as SR 524 (c 342)


 * State Route 525
 * I-5 near Everett to Mukilteo
 * 1937 as SSH 1I (c 207); south end moved from SR 99 to I-5 when I-5 was built; became SR 525 in 1970
 * Mukilteo to Clinton
 * 1994 as SR 525 (c 209)
 * Clinton to SR 20 near Keystone
 * 1937 as SSH 1D (c 207); became SR 525 in 1970
 * SR 525 to SR 526 at Mukilteo
 * 2001 as SR 525 (c 130)


 * State Route 526
 * SR 525 at Mukilteo to I-5 near Everett
 * 1937 as SSH 1I (c 207); shifted south from Mukilteo Boulevard in 1967 (ex.s. c 145); became SR 526 in 1970


 * State Route 527
 * SR 522 near Bothell to I-5 near Everett
 * 1937 as SSH 2A (c 207); deleted in 1943 (c 239)
 * 1957 as SSH 2J (c 172); became SR 527 in 1970


 * State Route 528
 * I-5 to SR 9 near Marysville
 * 1963 as PSH 1 (ex.s. c 3); became SR 528 in 1970


 * State Route 529
 * I-5 to I-5 in Everett
 * 1991 as SR 529 (c 342)
 * I-5 in Everett to I-5 in Marysville
 * 1913 as Pacific Highway (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); became SR 528 in 1970; became SR 529 in 1971 (ex.s. c 73)
 * I-5 to SR 528 in Marysville
 * 1961 as PSH 1 (ex.s. c 21); became SR 528 in 1970; became SR 529 in 1971 (ex.s. c 73)


 * State Route 530
 * I-5 to SR 9 near Arlington
 * 1937 as SSH 1E (c 207); became SR 530 in 1970
 * SR 9 near Arlington to Darrington
 * 1957 as SSH 1E (c 172); became SR 530 in 1970
 * Darrington to SR 20 near Rockport
 * 1983 as SR 530 (c 131)

Former portions:
 * I-5 at Conway to I-5 near Arlington
 * 1937 as SSH 1E (c 207); became SR 530 in 1970; deleted in 1991 (c 342)


 * State Route 531
 * Wenberg State Park to SR 9 near Marysville
 * 1991 as SR 531 (c 342)


 * State Route 532
 * McEacherns Corner to I-5 near Stanwood
 * 1945 as SSH 1Y (c 248); became SR 532 in 1970


 * State Route 534
 * I-5 at Conway to SR 9 at McMurray
 * 1937 as SSH 1H (c 207); became SR 534 in 1970


 * State Route 536
 * SR 20 at Fredonia to I-5 at Mt. Vernon
 * 1937 as PSH 1 (c 190); became SR 536 in 1970


 * Former State Route 537 (1964-1975)
 * See SR 237


 * State Route 538
 * I-5 at Mt. Vernon to SR 9
 * 1937 as SSH 1G (c 207); became SR 538 in 1970


 * State Route 539
 * I-5 at Bellingham to Canada
 * 1937 as SSH 1B (c 207); became SR 539 in 1970


 * Former State Route 540 (1964-1984)
 * Lummi Reservation to I-5 near Bellingham
 * 1953 as SSH 1Z (c 280); became SR 540 in 1970; deleted in 1984 (c 197)


 * State Route 542
 * I-5 at Bellingham to Austin Pass
 * 1925 as SR 1 (c 26); became PSH 1 in 1937 (c 190); became SR 542 in 1970


 * State Route 543
 * I-5 near Blaine to Canada
 * 1963 as PSH 1 (ex.s. c 3)??; became SR 543 in 1970


 * State Route 544
 * SR 539 near Wiser Lake to SR 9 near Nooksack
 * 1951 as SSH 1A (c 273); became SR 544 in 1970


 * State Route 546
 * SR 539 near Canada to SR 9 near Van Buren
 * 1937 as SSH 1A (c 207); deleted in 1951 (c 273)
 * 1957 as SSH 1B (c 172); became SR 546 in 1970


 * State Route 547
 * SR 542 near Kendall to SR 9 at Sumas
 * 1984 as SR 547 (c 197)


 * State Route 548
 * I-5 near Ferndale to I-5 in Blaine
 * 1991 as SR 548 (c 342)


 * State Route 599
 * I-5 to SR 99 near Seattle
 * 1957 as temporary PSH 1 (c 172); became SR 99T in 1970; became SR 599 in 1971 (ex.s. c 73)

600-999

 * Former State Route 603 (1964-1992)
 * Winlock to SR 6 near Chehalis
 * 1937 as SSH 12E (c 207); became SR 603 in 1970; deleted in 1991 (c 342)


 * State Route 702
 * SR 507 at McKenna to SR 7
 * 1937 as SSH 5J (c 207); became SR 702 in 1970


 * State Route 704
 * I-5 to SR 7 near Fort Lewis
 * 2002 as SR 704 (c 56)


 * Interstate 705
 * I-5 to Schuster Parkway in Tacoma


 * State Route 706
 * SR 7 at Elbe to Mount Rainier
 * 1913 as National Park Highway (c 65); became SR 5 in 1923 (c 185); became PSH 5 in 1937 (c 190); became SR 706 in 1970


 * U.S. Route 730
 * Oregon to US 12 near Wallula
 * 1923 as SR 3 (c 185); became PSH 3 in 1937 (c 190); became US 395 in 1970; became US 730 in 1985 (c 177)


 * Former State Route 801 (1964-1967)
 * See SR 121


 * State Route 821
 * I-82 near Yakima to I-82 near Ellensburg
 * 1973 as SR 821 (1st ex.s. c 151)


 * State Route 823
 * I-82 to Selah
 * 1984 as SR 823 (c 197)
 * Selah to SR 821
 * 1991 as SR 823 (c 342)


 * Former U.S. Route 830 (1964-1968?)
 * See SR 4, SR 14


 * Former State Route 831 (1964-1968?)
 * See SR 431


 * Former State Route 832 (1964-1968?)
 * See SR 432


 * Former State Route 833 (1964-1968?)
 * See SR 433


 * State Route 900
 * I-5 in Seattle to SR 167 near Renton
 * 1913 as Pacific Highway (c 65); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became SR 900 in 1970
 * SR 167 near Renton to I-90 near Issaquah
 * 1909 as SR 7 (c 92); became Sunset Highway in 1913 (c 65); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became SR 900 in 1970

Former portions:
 * I-90 to I-5 in Seattle
 * 1913 as Pacific Highway (c 65); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became SR 900 in 1970; deleted in 1991 (c 342)


 * Former State Route 901 (1964-1992)
 * SR 900 to I-90 near Issaquah
 * 1937 as SSH 2D (c 207); became SR 901 in 1970; deleted in 1971 (ex.s. c 73)
 * I-90 near Issaquah to SR 908 near Redmond
 * 1937 as SSH 2D (c 207); became SR 901 in 1970; moved east of Lake Sammamish (I-90 to SR 202) in 1991 (c 342); deleted in 1992 (c 26)


 * State Route 902
 * I-90 near Medical Lake to Medical Lake
 * 1991 as SR 902 (c 342)
 * Medical Lake to I-90 near Four Lakes
 * 1953 as SSH 11D (c 280); became SR 902 in 1970


 * State Route 903
 * SR 970 near Cle Elum to Cle Elum Lake
 * 1937 as SSH 2E (c 207); became SR 903 in 1970


 * State Route 904
 * I-90 near Tyler to I-90 near Four Lakes
 * 1961 as SSH 11H (ex.s. c 21); became SR 904 in 1970


 * State Route 906
 * I-90 near Snoqualmie Pass to I-90 at Hyak
 * 1967 as SSH 2K (ex.s. c 145); became SR 906 in 1970


 * State Route 908
 * I-405 in Kirkland to SR 202 near Redmond
 * 1937 as SSH 2D (c 207); became SR 901 in 1970; became SR 908 in 1971 (ex.s. c 73)

Former portions:
 * SR 520 near Bellevue to downtown Kirkland
 * 1937 as SSH 2A (c 207); deleted (moved east as PSH 1) in 1957 (c 172)
 * 1963 as SSH 2D (ex.s. c 3); became SR 901 in 1970; became SR 908 in 1971 (ex.s. c 73); deleted in 1991 (c 342)
 * Downtown Kirkland to I-405 in Kirkland
 * 1937 as SSH 2D (c 207); deleted in 1957 (c 172)
 * 1959 as SSH 2D (c 319); became SR 901 in 1970; became SR 908 in 1971 (ex.s. c 73); deleted in 1991 (c 342)


 * Former State Route 920 (1975-1985)
 * See SR 520


 * State Route 970
 * I-90 near Cle Elum to US 97 near Virden
 * 1909 as SR 7 (c 92); became Sunset Highway in 1913 (c 65); became SR 2 in 1923 (c 185); became PSH 2 in 1937 (c 190); became US 97 in 1970; became SR 970 in 1975 (c 63)


 * State Route 971
 * US 97A near Winesap to US 97A near Chelan
 * 1991 as SR 971 (c 342)

Other routes (deleted before 1964)
It's not clear exactly what remained after each new law was passed.
 * Cascade Wagon Road
 * 1893, Glacier to Marcus (c 126)
 * 1895, Marblemount to Marcus (c 168)
 * 1899, Marblemount to Columbia River south of Keller (c 123)
 * 1907, Marblemount to Kettle Falls as SR 13 (c 151); deleted in 1915 (c 164)
 * 1937, Twisp to Marblemount and branch to Stehekin as PSH 17 (c 190)
 * PSH 17 moved north in 1949 (c 225), bypassing the entire former road


 * Plain to Darrington
 * 1905 as SR 3 (c 7); deleted in 1915 (c 164)
 * Loomis to Tonasket
 * 1905 as SR 4 (c 7); deleted in 1923 (c 185)
 * Southwest of Peola to north of Troy, Oregon
 * 1909 as SR 16 (c 61); deleted in 1919 (c 110)
 * Marblemount to Mill Creek (where?)
 * 1905 as SR 11 (c 174); became Skagit Highway in 1917 (c 75); became Roosevelt Highway in 1919 (c 79); deleted in 1923 (c 185)
 * Mill Creek to Barron
 * 1907 as SR 11 (c 151); became Skagit Highway in 1917 (c 75); became Roosevelt Highway in 1919 (c 79); deleted in 1923 (c 185)
 * Barron to Mazama
 * 1905 as SR 12 (c 174); became Roosevelt Highway in 1919 (c 79); became Methow Valley Highway in 1923 (c 185); became PSH 16 in 1937 (c 190); deleted in 1949 (c 225)
 * Riffe to Kosmos
 * 1905 as SR 5 (c 7); became PSH 5 in 1937 (c 190); deleted in 1967 (ex.s. c 145)
 * Evergreen Way, SR 99 to Everett
 * 1913 as Pacific Highway (c 65); became SR 1 in 1923 (c 185); became PSH 1 in 1937 (c 190); deleted in 1963 (ex.s. c 3)?
 * Republic to Ferry
 * 1915 as SR 4 (c 164); deleted in 1923 (c 185)
 * Branch to Cathlamet
 * 1923 as SR 12 (c 185); deleted in 1937 (c 190)?
 * Almira to Grand Coulee Dam
 * 1937 as PSH 2 (c 190); deleted in 1955 (c 383)
 * I-5 at Blaine to SR 539 near Canada
 * 1937 as SSH 1A (c 207); deleted in 1953 (c 280)
 * Lincoln Creek Road/Independence Road, I-5 to US 12
 * 1937 as SSH 1N (c 207); deleted in 1943 (c 212)
 * Woodinville Duvall Road, SR 522 to SR 203
 * 1937 as SSH 2C (c 207); deleted in 1943 (c 239)
 * Lateral A Road?, SR 220 to US 97
 * 1937 as SSH 3C (c 207); deleted in 1957 (c 172)
 * Touchet North Road, US 12 to SR 124
 * 1937 as SSH 3D (c 207); deleted in 1951 (c 273)
 * Grand Boulevard, US 195 to Spokane
 * 1937 as SSH 3I (c 207); deleted in 1953 (c 280)
 * Thorp Highway, SR 10 to US 97
 * 1937 as SSH 3M (c 207); deleted in 1953 (c 280)
 * Auburn Black Diamond Road, SR 164 to SR 516
 * 1937 as SSH 5B (c 207); deleted in 1963 (ex.s. c 3)
 * Orville Road, Electron to SR 162
 * 1937 as SSH 5E (c 207); deleted in 1955 (c 383)
 * Kittitas Highway, Ellensburg to Vantage Highway
 * 1937 as SSH 7B (c 207); deleted in 1953 (c 280)
 * Wind River Road, SR 14 to forest
 * 1937 as SSH 8C (c 207); deleted in 1961 (ex.s. c 21)
 * Ocean Beach Road, US 101 to SR 109
 * 1937 as SSH 9C (c 207); deleted in 1947 (c 232)
 * Copalis Beach Road, SR 109 to Ocean Beach Road
 * 1937 as SSH 9C (c 207); deleted in 1947 (c 232)
 * Sequim-Dungeness Way, US 101 to Dungeness
 * 1937 as SSH 9F (c 207); deleted in 1959 (c 319)
 * SR 403 to Eden
 * 1937 as SSH 12C (c 207); deleted in 1943 (c 147)
 * Colby to Manchester
 * 1949 as PSH 14 (c 225); deleted in 1963 (ex.sess. c 3)?
 * SR 3 to Lofall ferry dock
 * 1949 as PSH 21 (c 225); deleted in 1957 (c 172)