Route 18, or Highway 18, may refer to:

International

  • Asian Highway 18
  • European route E18
  • European route E018

Argentina

Australia

  • Waterfall Way

Canada

  • 20px Alberta Highway 18
  • 20px British Columbia Highway 18
  • 20px Manitoba Highway 18
  • 20px Ontario Highway 18 (former)
  • 20px Prince Edward Island Route 18
  • 20px Saskatchewan Highway 18

China

  • 30px G18 Expressway

Costa Rica

  • 25px National Route 18

Cuba

  • x24px Highway 2–18

Czech Republic

  • 26px I/18 Highway; Czech: Silnice I/18

Greece

  • 33px EO18 road

India

  • 25px National Highway 18 (India)

Iran

Ireland

  • 35px M18 motorway (Ireland)
  • 30px N18 road (Ireland)

Italy

  • 25px Autostrada A18
  • 40px State road 18

Japan

  • 20px Japan National Route 18
  • 25px Jōshin-etsu Expressway

Korea, South

  • 25px National Route 18

Malaysia

  • Malaysia Federal Route 18

New Zealand

  • 20px New Zealand State Highway 18

Paraguay

  • 20px| National Route 18

Poland

  • 30px Motorway A18
  • 30px 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

  • 25px British A18 (Doncaster-Ludborough)
  • 30px British M18 (Thurcroft-Rawcliffe)

United States

  • 20px U.S. Route 18
  • 15px New England Route 18 (former)
  • 20px Alabama State Route 18
  • 20px County Route 18 (Lee County, Alabama)
  • 20px Arkansas Highway 18
  • 20px California State Route 18
  • 20px County route A18 (California)
  • 20px County Route E18 (California)
  • 20px County Route G18 (California)
  • 20px County Route J18 (California)
  • 20px County Route S18 (California)
  • 20px Colorado State Highway 18 (pre-1968) (former)
  • 20px Delaware Route 18
  • 20px Florida State Road 18
  • 20px County Road 18 (Bradford County, Florida)
  • 20px County Road 18 (Columbia County, Florida)
  • 20px County Road 18 (Union County, Florida)
  • 20px Georgia State Route 18
  • 20px Hawaii Route 18 (former)
  • 20px Illinois Route 18
  • 20px Indiana State Road 18
  • 20px K-18 (Kansas highway)
  • 20px Kentucky Route 18
  • 20px Louisiana Highway 18
  • 20px Maine State Route 18 (former)
  • 20px Maryland Route 18
  • 20px Massachusetts Route 18
  • 20px M-18 (Michigan highway)
  • 20px Minnesota State Highway 18
  • 20px County Road 18 (Anoka County, Minnesota)
  • 20px County Road 18 (Scott County, Minnesota)
  • 20px County Road 18 (Washington County, Minnesota)
  • 20px Mississippi Highway 18
  • 20px Missouri Route 18
  • 20px Nebraska Highway 18
  • 20px Nevada State Route 18 (former)
  • 20px New Hampshire Route 18
  • 20px New Jersey Route 18
  • 20px New Jersey Route 18N (former)
  • 20px County Route 18 (Monmouth County, New Jersey)
  • 20px New Mexico State Road 18
  • 20px New York State Route 18
  • 20px County Route 18 (Allegany County, New York)
  • 20px County Route 18 (Chautauqua County, New York)
  • 20px County Route 18 (Columbia County, New York)
  • 20px County Route 18 (Dutchess County, New York)
  • 20px County Route 18 (Erie County, New York)
  • 20px County Route 18 (Essex County, New York)
  • 20px County Route 18 (Herkimer County, New York)
  • 20px County Route 18 (Onondaga County, New York)
  • 20px County Route 18 (Ontario County, New York)
  • 20px County Route 18 (Orange County, New York)
  • 20px County Route 18 (Orleans County, New York)
  • 20px County Route 18 (Otsego County, New York)
  • 20px County Route 18 (Rensselaer County, New York)
  • 20px County Route 18 (Schoharie County, New York)
  • 20px County Route 18 (Schuyler County, New York)
  • 20px County Route 18 (Steuben County, New York)
  • 20px County Route 18 (Suffolk County, New York)
  • 20px County Route 18 (Tioga County, New York)
  • 20px County Route 18 (Washington County, New York)
  • 20px County Route 18 (Westchester County, New York)
  • 20px County Route 18 (Yates County, New York)
  • 20px North Carolina Highway 18
  • 20px North Dakota Highway 18
  • 20px Ohio State Route 18
  • 20px Oklahoma State Highway 18
  • 25px Oklahoma State Highway 18B
  • 20px Oregon Route 18
  • 20px Pennsylvania Route 18
  • 25px South Carolina Highway 18
  • 20px South Dakota Highway 18 (former)
  • 25px Tennessee State Route 18
  • 20px Texas State Highway 18
  • 20px Farm to Market Road 18
  • 20px Ranch to Market Road 18 (former)
  • 20px Utah State Route 18
  • 20px Vermont Route 18
  • 20px Virginia State Route 18
  • 20px Washington State Route 18
  • 20px Primary State Highway 18 (Washington) (former)
  • 20px West Virginia Route 18
  • 20px Wisconsin Highway 18 (former)

;Territories

  • 20px Guam Highway 18
  • 20px Puerto Rico Highway 18

Zambia

  • 20x20px 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