Route 18, or Highway 18, may refer to:
International
Argentina
Australia
Canada
China
Costa Rica
Cuba
Czech Republic
Greece
India
Iran
Ireland
Italy
Japan
Korea, South
Malaysia
New Zealand
Paraguay
Poland
Russia
South Africa
Ukraine
United Kingdom
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
Zambia
See also