Route 18, or Highway 18, may refer to:

International

• Asian Highway 18

• European route E18

• European route E018

Argentina

Australia

• Waterfall Way

Canada

• Alberta Highway 18

• British Columbia Highway 18

• Manitoba Highway 18

• Ontario Highway 18 (former)

• Prince Edward Island Route 18

• Saskatchewan Highway 18

China

• G18 Expressway

Costa Rica

• National Route 18

Cuba

• Highway 2–18

Czech Republic

• I/18 Highway; Czech: Silnice I/18

Greece

• EO18 road (1963–1995; now numbered the EO19)

India

• National Highway 18 (India)

Iran

Ireland

• M18 motorway (Ireland)

• N18 road (Ireland)

Italy

• Autostrada A18

• State road 18

Japan

• Japan National Route 18

• Jōshin-etsu Expressway

Korea, South

• National Route 18

Malaysia

• Malaysia Federal Route 18

New Zealand

• New Zealand State Highway 18

Paraguay

• National Route 18

Poland

• Motorway A18

• 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

• British A18 (Doncaster-Ludborough)

• British M18 (Thurcroft-Rawcliffe)

United States

• U.S. Route 18

• New England Route 18 (former)

Alabama State Route 18

• County Route 18 (Lee County, Alabama)

• Arkansas Highway 18

California State Route 18

• County route A18 (California)

• County Route E18 (California)

• County Route G18 (California)

• County Route J18 (California)

• County Route S18 (California)

• Colorado State Highway 18 (pre-1968) (former)

• Delaware Route 18

Florida State Road 18

• County Road 18 (Bradford County, Florida)

• County Road 18 (Columbia County, Florida)

• County Road 18 (Union County, Florida)

• Georgia State Route 18

• Hawaii Route 18 (former)

• Illinois Route 18

• Indiana State Road 18

• K-18 (Kansas highway)

• Kentucky Route 18

• Louisiana Highway 18

• Maine State Route 18 (former)

• Maryland Route 18

• Massachusetts Route 18

• M-18 (Michigan highway)

Minnesota State Highway 18

• County Road 18 (Anoka County, Minnesota)

• County Road 18 (Scott County, Minnesota)

• County Road 18 (Washington County, Minnesota)

• Mississippi Highway 18

• Missouri Route 18

• Nebraska Highway 18

• Nevada State Route 18 (former)

• New Hampshire Route 18

New Jersey Route 18

• New Jersey Route 18N (former)

• County Route 18 (Monmouth County, New Jersey)

• New Mexico State Road 18

New York State Route 18

• County Route 18 (Allegany County, New York)

• County Route 18 (Chautauqua County, New York)

• County Route 18 (Columbia County, New York)

• County Route 18 (Dutchess County, New York)

• County Route 18 (Erie County, New York)

• County Route 18 (Essex County, New York)

• County Route 18 (Herkimer County, New York)

• County Route 18 (Onondaga County, New York)

• County Route 18 (Ontario County, New York)

• County Route 18 (Orange County, New York)

• County Route 18 (Orleans County, New York)

• County Route 18 (Otsego County, New York)

• County Route 18 (Rensselaer County, New York)

• County Route 18 (Schoharie County, New York)

• County Route 18 (Schuyler County, New York)

• County Route 18 (Steuben County, New York)

• County Route 18 (Suffolk County, New York)

• County Route 18 (Tioga County, New York)

• County Route 18 (Washington County, New York)

• County Route 18 (Westchester County, New York)

• County Route 18 (Yates County, New York)

• North Carolina Highway 18

• North Dakota Highway 18

• Ohio State Route 18

Oklahoma State Highway 18

• Oklahoma State Highway 18B

• Oregon Route 18

• Pennsylvania Route 18

• South Carolina Highway 18

• South Dakota Highway 18 (former)

• Tennessee State Route 18

Texas State Highway 18

• Farm to Market Road 18

• Ranch to Market Road 18 (former)

• Utah State Route 18

• Vermont Route 18

• Virginia State Route 18

Washington State Route 18

• Primary State Highway 18 (Washington) (former)

• West Virginia Route 18

• Wisconsin Highway 18 (former)

• Territories

• Guam Highway 18

• Puerto Rico Highway 18

Zambia

• M18 road (Zambia)

See also

• List of A18 roads

• List of M18 roads

• List of highways numbered 18A

• List of highways numbered 18B

• List of highways numbered 18C

• List of highways numbered 18D

• List of highways numbered 18E

• List of highways numbered 18F

• Highway 18, a Golf Channel series similar to The Amazing Race