List of highways numbered 18

Route 18, or Highway 18, may refer to:

International

 * Asian Highway 18
 * European route E18
 * European route E018

Australia

 * Waterfall Way

Canada

 * Alberta Highway 18.svg Alberta Highway 18
 * BC-18.svg British Columbia Highway 18
 * Manitoba Highway 18.svg Manitoba Highway 18
 * Ontario 18.svg Ontario Highway 18 (former)
 * PEI Highway 18.svg Prince Edward Island Route 18
 * Saskatchewan Highway 18 (jct).svg Saskatchewan Highway 18

China

 * China Expwy G18 sign with name.svg G18 Expressway

Costa Rica

 * CR RNP 18.svg National Route 18

Czech Republic

 * SilniceI18.svg I/18 Highway; Czech: Silnice I/18

India

 * NH25-IN.svg National Highway 18 (India)

Ireland

 * M18-IE.svg M18 motorway (Ireland)
 * IRL N18.svg N18 road (Ireland)

Italy

 * Autostrada A18 Italia.svg Autostrada A18
 * Strada Statale 18 Italia.svg State road 18

Japan

 * Japanese National Route Sign 0018.svg Japan National Route 18
 * JP Expressway E18.svg Jōshin-etsu Expressway

Korea, South

 * Korea National Route No.18.svg National Route 18

New Zealand

 * State Highway 18 NZ.svg New Zealand State Highway 18

Paraguay

 * [[Image:R18-PY.svg|20px|]] National Route 18

Poland

 * A18-PL.svg Motorway A18
 * DK18-PL.svg National road 18

Russia

 * M18 motorway (Russia) running from Saint Petersburg to Murmansk

South Africa

 * N18 road (South Africa)

Ukraine

 * Highway M18 (Ukraine)

United Kingdom

 * UK road A18.svg British A18 (Doncaster-Ludborough)
 * UK-Motorway-M18.svg British M18 (Thurcroft-Rawcliffe)

United States

 * US 18.svg U.S. Route 18
 * New England 18.svg New England Route 18 (former)
 * Alabama 18.svg Alabama State Route 18
 * Arkansas 18.svg Arkansas Highway 18
 * California 18.svg California State Route 18
 * CR A18 jct.svg County route A18 (California)
 * CR E18 jct.svg County Route E18 (California)
 * CR G18 jct.svg County Route G18 (California)
 * CR J18 jct.svg County Route J18 (California)
 * CR S18 jct.svg County Route S18 (California)
 * Colorado 18.svg Colorado State Highway 18 (pre-1968) (former)
 * Elongated circle 18.svg Delaware Route 18
 * Florida 18.svg Florida State Road 18
 * Bradford County 18.svg County Road 18 (Bradford County, Florida)
 * County Road 18 FL.svg County Road 18 (Columbia County, Florida)
 * County Road 18 FL.svg County Road 18 (Union County, Florida)
 * Georgia 18.svg Georgia State Route 18
 * HI-18.svg Hawaii Route 18 (former)
 * Illinois 18.svg Illinois Route 18
 * Indiana 18.svg Indiana State Road 18
 * K-18.svg K-18 (Kansas highway)
 * Circle sign 18.svg Kentucky Route 18
 * Louisiana 18.svg Louisiana Highway 18
 * MA Route 18.svg Maine State Route 18 (former)
 * MD Route 18.svg Maryland Route 18
 * MA Route 18.svg Massachusetts Route 18
 * M-18.svg M-18 (Michigan highway)
 * MN-18.svg Minnesota State Highway 18
 * Anoka County 18.svg County Road 18 (Anoka County, Minnesota)
 * Scott County Route 18 MN.svg County Road 18 (Scott County, Minnesota)
 * Washington County Route 18 MN.svg County Road 18 (Washington County, Minnesota)
 * Circle sign 18.svg Mississippi Highway 18
 * MO-18.svg Missouri Route 18
 * N-18.svg Nebraska Highway 18
 * Nevada 18.svg Nevada State Route 18 (former)
 * NH Route 18.svg New Hampshire Route 18
 * Circle sign 18.svg New Jersey Route 18
 * NJ 18N (cutout).svg New Jersey Route 18N (former)
 * Monmouth County Route 18 NJ.svg County Route 18 (Monmouth County, New Jersey)
 * New Mexico 18.svg New Mexico State Road 18
 * NY-18.svg New York State Route 18
 * CR 18 jct.svg County Route 18 (Allegany County, New York)
 * CR 18 jct.svg County Route 18 (Chautauqua County, New York)
 * CR 18 jct.svg County Route 18 (Columbia County, New York)
 * Dutchess County Route 18 NY.svg County Route 18 (Dutchess County, New York)
 * Erie County Route 18 NY.svg County Route 18 (Erie County, New York)
 * Essex County Route 18 NY.svg County Route 18 (Essex County, New York)
 * CR 18 jct.svg County Route 18 (Herkimer County, New York)
 * CR 18 jct.svg County Route 18 (Onondaga County, New York)
 * CR 18 jct.svg County Route 18 (Ontario County, New York)
 * CR 18 jct.svg County Route 18 (Orange County, New York)
 * CR 18 jct.svg County Route 18 (Orleans County, New York)
 * Otsego County Route 18 NY.svg County Route 18 (Otsego County, New York)
 * Rensselaer County Route 18 NY.svg County Route 18 (Rensselaer County, New York)
 * Schoharie County Route 18 NY.svg County Route 18 (Schoharie County, New York)
 * Schuyler County Route 18 NY.svg County Route 18 (Schuyler County, New York)
 * CR 18 jct.svg County Route 18 (Steuben County, New York)
 * Suffolk County Route 18 NY.svg County Route 18 (Suffolk County, New York)
 * CR 18 jct.svg County Route 18 (Tioga County, New York)
 * Washington County Route 18 NY.svg County Route 18 (Washington County, New York)
 * CR 18 jct.svg County Route 18 (Westchester County, New York)
 * Yates County Route 18 NY.svg County Route 18 (Yates County, New York)
 * NC 18.svg North Carolina Highway 18
 * ND-18 (2015).svg North Dakota Highway 18
 * OH-18.svg Ohio State Route 18
 * Oklahoma State Highway 18.svg Oklahoma State Highway 18
 * Oklahoma State Highway 18B.svg Oklahoma State Highway 18B
 * OR 18.svg Oregon Route 18
 * PA-18.svg Pennsylvania Route 18
 * South Carolina 18.svg South Carolina Highway 18
 * SD 18.svg South Dakota Highway 18 (former)
 * Tennessee 18.svg Tennessee State Route 18
 * Texas 18.svg Texas State Highway 18
 * Texas FM 18.svg Farm to Market Road 18
 * Texas RM 18.svg Ranch to Market Road 18 (former)
 * Utah SR 18.svg Utah State Route 18
 * Vermont 18.svg Vermont Route 18
 * Virginia 18.svg Virginia State Route 18
 * WA-18.svg Washington State Route 18
 * WA-PSH18.svg Primary State Highway 18 (Washington) (former)
 * WV-18.svg West Virginia Route 18
 * WIS 18.svg Wisconsin Highway 18 (former)


 * Territories
 * Guam Route 18.svg Guam Highway 18
 * PR primary 18.svg Puerto Rico Highway 18

Zambia

 * Elongated circle 18.svg M18 road (Zambia)