Route 23, or Highway 23, can refer to:

International

• E23 European route E23

Australia

• Federal Highway (Australia)
• Monaro Highway
• (South Australia)
• Dorat Road (not signed everywhere)

Austria

• Autobahn Südosttangente Wien

Canada

• Alberta Highway 23
• British Columbia Highway 23
• Manitoba Highway 23
• Ontario Highway 23
• Prince Edward Island Route 23
• Saskatchewan Highway 23

Costa Rica

• National Route 23

Czech Republic

• I/23 Highway; Czech: Silnice I/23

Finland

• Finnish national road 23

India

• National Highway 23 (India)

Ireland

• N23 road (Ireland)

Italy

• Autostrada A23

Japan

• Japan National Route 23
• Higashi-Meihan Expressway
• Ise Expressway

Korea, South

• National Route 23
• Gukjido 23

Malaysia

• FT 23Malaysia Federal Route 23

Mexico

• Mexican Federal Highway 23

New Zealand

• State Highway 23

Norway

• Norwegian National Road 23

United Kingdom

• British A23 (Brighton-London)
• M23 (Crawley-Marling Glen)
• A23 road (Northern Ireland)

United States

• U.S. Route 23
• Alabama State Route 23
• Arkansas Highway 23
  • Arkansas Highway 23W (former)
• California State Route 23
  • County Route A23 (California)
  • County Route J23 (California)
• Colorado State Highway 23
• Delaware Route 23
• Florida State Road 23
• Georgia State Route 23
• Illinois Route 23
• Indiana State Road 23
• Iowa Highway 23
• K-23 (Kansas highway)
• Louisiana Highway 23
  • Louisiana State Route 23
• Maine State Route 23
• Maryland Route 23
  • Maryland Route 23B (former)
• Massachusetts Route 23
• M-23 (Michigan highway) (former)
• Minnesota State Highway 23
  • County Road 23 (Anoka County, Minnesota)
  • County Road 23 (Dakota County, Minnesota)
  • County Road 23 (Ramsey County, Minnesota)
• Mississippi Highway 23
• Missouri Route 23
  • Missouri Route 23 (1922) (former)
• Montana Highway 23
• Nebraska Highway 23
• Nevada State Route 23 (former)
• New Jersey Route 23
  • County Route 23 (Monmouth County, New Jersey)
• New Mexico State Road 23
• New York State Route 23
  • County Route 23 (Allegany County, New York)
  • County Route 23 (Cattaraugus County, New York)
  • County Route 23 (Cayuga County, New York)
  • County Route 23 (Clinton County, New York)
  • County Route 23 (Dutchess County, New York)
  • County Route 23 (Genesee County, New York)
  • County Route 23B (Greene County, New York)
  • County Route 23C (Greene County, New York)
  • County Route 23 (Herkimer County, New York)
  • County Route 23 (Lewis County, New York)
  • County Route 23 (Livingston County, New York)
  • County Route 23 (Niagara County, New York)
  • County Route 23 (Onondaga County, New York)
  • County Route 23 (Orange County, New York)
  • County Route 23 (Oswego County, New York)
  • County Route 23 (Otsego County, New York)
  • County Route 23 (Putnam County, New York)
  • County Route 23 (Rensselaer County, New York)
  • County Route 23 (Rockland County, New York)
  • County Route 23 (Schuyler County, New York)
  • County Route 23 (St. Lawrence County, New York)
  • County Route 23 (Suffolk County, New York)
  • County Route 23 (Sullivan County, New York)
  • County Route 23 (Tioga County, New York)
  • County Route 23 (Warren County, New York)
  • County Route 23 (Washington County, New York)
• North Carolina Highway 23 (former)
• North Dakota Highway 23
  • North Dakota Highway 23B (McKenzie County)
  • North Dakota Highway 23B (Mountrail County)
• Ohio State Route 23 (1923-1927) (former)
• Oklahoma State Highway 23
• Oregon Route 23 (former)
• Pennsylvania Route 23
• South Carolina Highway 23
• South Dakota Highway 23 (former)
• Tennessee State Route 23
• Texas State Highway 23
  • Texas State Highway Loop 23 (former)
  • Texas State Highway Spur 23 (former)
  • Farm to Market Road 23
  • Texas Park Road 23
• Utah State Route 23
• Vermont Route 23
• State Route 23 (Virginia 1918-1933) (former)
• Washington State Route 23
• West Virginia Route 23
• Wisconsin Highway 23

Territories

• Puerto Rico Highway 23

See also

• List of A23 roads
• List of highways numbered 23A