List of highways numbered 21

For roads named A21 see ; List of A21 roads Route 21, or Highway 21, can refer to:

International

 * European route E21

Australia

 * Chandler Highway
 * Toowoomba Connection Road (QLD)
 * – Kakadu Highway

Austria

 * A21-AT.svg Wiener Außenring Autobahn

Cambodia

 * National Road 21 (Cambodia)

Canada

 * Alberta Highway 21.svg Alberta Highway 21
 * BC-21.svg British Columbia Highway 21
 * Manitoba Highway 21.svg Manitoba Highway 21
 * NL Route 21.svg Newfoundland and Labrador Route 21
 * Ontario 21.svg Ontario Highway 21
 * PEI Highway 21.svg Prince Edward Island Route 21
 * Saskatchewan Highway 21 (jct).svg Saskatchewan Highway 21

Costa Rica

 * CR RNP 21.svg National Route 21

Czech Republic

 * SilniceI21.svg I/21 Highway; Czech: Silnice I/21

Hungary

 * 21 (Hu) Otszogletu zold tabla.svg Main road 21 (Hungary)

India

 * NH21-IN.svg National Highway 21 (India)

Iran

 * Iran First Level Road 21.png Road 21

Ireland

 * IRL N21.svg N21 road (Ireland)

Italy

 * Autostrada A21 Italia.svg Autostrada A21

Japan

 * Japanese National Route Sign 0021.svg Japan National Route 21

Korea, South

 * Korea National Route No.21.svg National Route 21

Moldova

 * Schild_M21_Moldavië.svg M21 highway (Moldova)

New Zealand

 * State Highway 21 NZ.svg New Zealand State Highway 21

Paraguay

 * [[Image:R21-PY.svg|20px|]] National Route 21

Turkey

 * O21-TR sign.svg, a motorway in Turkey running from Kemerhisar, Niğde Province to Tarsus, Mersin Province.

United Kingdom

 * UK road A21.svg British A21 (Hastings-London)
 * UK_road_A21.svg A21 road (Northern Ireland)

United States

 * US 21.svg U.S. Route 21
 * Alabama 21.svg Alabama State Route 21
 * Arkansas 21.svg Arkansas Highway 21
 * Arkansas 21E.svg Arkansas Highway 21E (former)
 * Arkansas 21W.svg Arkansas Highway 21W (former)
 * California 21.svg California State Route 21 (former)
 * CR A21 jct.svg County Route A21 (California)
 * CR E21 jct.svg County Route E21 (California)
 * CR G21 jct.svg County Route G21 (California)
 * CR J21 jct.svg County Route J21 (California)
 * CR S21 jct.svg County Route S21 (California)
 * Colorado 21.svg Colorado State Highway 21
 * Connecticut Highway 21.svg Connecticut Route 21
 * Florida 21.svg Florida State Road 21
 * Clay County Road 21B FL.svg County Road 21B (Clay County, Florida)
 * CR 21B jct.svg County Road 21B (Duval County, Florida)
 * CR 21D jct.svg County Road 21D (Duval County, Florida)
 * Marion County Road 21 FL.svg County Road 21 (Marion County, Florida)
 * Putnam County Road 21 FL.svg County Road 21 (Putnam County, Florida)
 * Georgia 21.svg Georgia State Route 21
 * HI-21.svg Hawaii Route 21 (former)
 * ID-21.svg Idaho State Highway 21
 * Illinois 21.svg Illinois Route 21
 * Indiana 21.svg Indiana State Road 21 (former)
 * Iowa 21.svg Iowa Highway 21
 * Circle sign 21.svg Kentucky Route 21
 * Louisiana 21.svg Louisiana Highway 21
 * MD Route 21.svg Maryland Route 21
 * MA Route 21.svg Massachusetts Route 21
 * M-21.svg M-21 (Michigan highway)
 * MN-21.svg Minnesota State Highway 21
 * CR 21 jct.svg County Road 21 (Anoka County, Minnesota)
 * Hennepin County 21.svg County Road 21 (Hennepin County, Minnesota)
 * CR 21 jct.svg County Road 21 (Scott County, Minnesota)
 * Circle sign 21.svg Mississippi Highway 21
 * MO-21.svg Missouri Route 21
 * MT-21.svg Montana Highway 21
 * N-21.svg Nebraska Highway 21
 * N SPUR 21B.svg Nebraska Spur 21B
 * N SPUR 21C.svg Nebraska Spur 21C
 * Nevada 21.svg Nevada State Route 21 (former)
 * Circle sign 21.svg New Jersey Route 21
 * Bergen County Route C-21 NJ.svg County Route C21 (Bergen County, New Jersey)
 * Monmouth County Route 21 NJ.svg County Route 21 (Monmouth County, New Jersey)
 * New Mexico 21.svg New Mexico State Road 21
 * NY-21.svg New York State Route 21
 * CR 21 jct.svg County Route 21 (Allegany County, New York)
 * CR 21 jct.svg County Route 21 (Chautauqua County, New York)
 * CR 21 jct.svg County Route 21 (Columbia County, New York)
 * CR 21B jct.svg County Route 21B (Columbia County, New York)
 * Columbia County Route 21C NY.svg County Route 21C (Columbia County, New York)
 * CR 21 jct.svg County Route 21 (Delaware County, New York)
 * Dutchess County Route 21 NY.svg County Route 21 (Dutchess County, New York)
 * Erie County Route 21 NY.svg County Route 21 (Erie County, New York)
 * Essex County Route 21 NY.svg County Route 21 (Essex County, New York)
 * CR 21 jct.svg County Route 21 (Genesee County, New York)
 * Hamilton County Route 21 NY.svg County Route 21 (Hamilton County, New York)
 * CR 21 jct.svg County Route 21 (Herkimer County, New York)
 * Lewis County Route 21 NY.svg County Route 21 (Lewis County, New York)
 * CR 21 jct.svg County Route 21 (Oneida County, New York)
 * CR 21 jct.svg County Route 21 (Ontario County, New York)
 * CR 21 jct.svg County Route 21 (Orange County, New York)
 * CR 21 jct.svg County Route 21 (Oswego County, New York)
 * CR 21 jct.svg County Route 21 (Otsego County, New York)
 * Putnam County Route 21 NY.svg County Route 21 (Putnam County, New York)
 * Rensselaer County Route 21 NY.svg County Route 21 (Rensselaer County, New York)
 * Saratoga County Route 21 NY.svg County Route 21 (Saratoga County, New York)
 * CR 21 jct.svg County Route 21 (Schoharie County, New York)
 * Suffolk County Route 21 NY.svg County Route 21 (Suffolk County, New York)
 * Sullivan County Route 21 NY.svg County Route 21 (Sullivan County, New York)
 * CR 21 jct.svg County Route 21 (Ulster County, New York)
 * Washington County Route 21 NY.svg County Route 21 (Washington County, New York)
 * CR 21 jct.svg County Route 21 (Westchester County, New York)
 * CR 21 jct.svg County Route 21 (Wyoming County, New York)
 * Yates County Route 21 NY.svg County Route 21 (Yates County, New York)
 * NC 21.svg North Carolina Highway 21 (former)
 * ND-21 (2015).svg North Dakota Highway 21
 * OH-21.svg Ohio State Route 21
 * PA-21.svg Pennsylvania Route 21
 * SC-21 (1926).svg South Carolina Highway 21 (1920s) (former)
 * SD 21.svg South Dakota Highway 21
 * Tennessee 21.svg Tennessee State Route 21
 * Texas 21.svg Texas State Highway 21
 * Texas Loop 21.svg Texas State Highway Loop 21
 * Texas FM 21.svg Farm to Market Road 21
 * Texas Park Road 21.svg Texas Park Road 21
 * Utah SR 21.svg Utah State Route 21
 * Virginia 21.svg State Route 21 (Virginia 1918-1933) (former)
 * WA-21.svg Washington State Route 21
 * WA-PSH21.svg Primary State Highway 21 (Washington) (former)
 * WA-SSH21-B.svg Secondary State Highway 21B (Washington) (former)
 * WA-SSH21-C.svg Secondary State Highway 21C (Washington) (former)
 * CR 21 jct.svg County Route 21 (Jackson County, West Virginia)
 * CR 21 jct.svg County Route 21 (Kanawha County, West Virginia)
 * CR 21 jct.svg County Route 21 (Wirt County, West Virginia)
 * CR 21 jct.svg County Route 21 (Wood County, West Virginia)
 * WIS 21.svg Wisconsin Highway 21


 * Territories
 * PR urban primary 21.svg Puerto Rico Highway 21