The following highways are numbered 40:

International

• E40 European route E40

Argentina

• National Route 40

Australia

• NSW State Route 40 (Windsor Road and Victoria Road in Sydney)
• Victorian State Route 40
• Mulligan Highway (Queensland)

Brazil

• BR-040

Canada

• Alberta Highway 40
• Newfoundland and Labrador Route 40
• Ontario Highway 40
• Quebec Autoroute 40
• Saskatchewan Highway 40

China

• G40 Expressway

Czech Republic

• I/40 Highway; Czech: Silnice I/40

Iceland

• Route 40 (Iceland)

India

• NH 40

Ireland

• N40 road (Ireland)

Israel

• Highway 40 (Israel)

Japan

• Japan National Route 40

Jordan

• Highway 40

Korea, South

• Pyeongtaek–Jecheon Expressway
• National Route 40

Saudi Arabia

• Highway 40 (Saudi Arabia)

Sweden

• Swedish road 40, formerly Swedish national road 40 connecting Göteborg, Borås, and Jönköping

Mexico

• Mexican Federal Highway 40

United Kingdom

• British A40 (London-Fishguard)
• British M40 (Denham-Earlswood)

United States

• Interstate 40
  • Interstate 40 Business
• U.S. Route 40
  • U.S. Route 40N (former)
  • U.S. Route 40S (former)
• Alabama State Route 40
• Arkansas Highway 40 (1926-1958) (former)
• Colorado State Highway 40
• Connecticut Route 40
• Florida State Road 40
  • County Road 40 (Levy County, Florida)
  • County Road 40 (Marion County, Florida)
• Georgia State Route 40
• Hawaii Route 40 (former)
• Idaho State Highway 40
• Illinois Route 40
• Kentucky Route 40
• Louisiana Highway 40
• Massachusetts Route 40
• M-40 (Michigan highway)
• Minnesota State Highway 40
  • County Road 40 (Hennepin County, Minnesota)
  • County Road 40 (Ramsey County, Minnesota)
• Missouri Route 40 (1922) (former)
• Montana Highway 40
• Nebraska Highway 40
  • Nebraska Link 40C
  • Nebraska Link 40G
  • Nebraska Spur 40D
  • Nebraska Recreation Road 40E
• Nevada State Route 40 (1935) (former)
• New Jersey Route 40 (former)
  • County Route 40 (Bergen County, New Jersey)
  • County Route 40 (Monmouth County, New Jersey)
• New Mexico State Road 40 (former)
• New York State Route 40
  • County Route 40 (Allegany County, New York)
  • County Route 40 (Cattaraugus County, New York)
  • County Route 40 (Chenango County, New York)
  • County Route 40 (Dutchess County, New York)
  • County Route 40 (Genesee County, New York)
  • County Route 40 (Greene County, New York)
  • County Route 40 (Madison County, New York)
  • County Route 40 (Niagara County, New York)
  • County Route 40 (Oneida County, New York)
  • County Route 40 (Otsego County, New York)
  • County Route 40 (Putnam County, New York)
  • County Route 40 (Rensselaer County, New York)
  • County Route 40 (Schenectady County, New York)
  • County Route 40 (St. Lawrence County, New York)
  • County Route 40 (Suffolk County, New York)
  • County Route 40 (Ulster County, New York)
• North Carolina Highway 40 (former)
• North Dakota Highway 40
• Ohio State Route 40 (1923-1927) (former)
• Oklahoma State Highway 40 (former)
• South Carolina Highway 40 (former)
• South Dakota Highway 40
• Tennessee State Route 40
  • APD-40
• Texas State Highway 40
  • Texas State Highway Loop 40
  • Farm to Market Road 40
  • Urban Road 40 (signed as Farm to Market Road 40)
  • Texas Park Road 40
• Utah State Route 40 (former)
• Virginia State Route 40
  • Virginia State Route 40 (1923-1933) (former)
• West Virginia Route 40 (1920s) (former)
• Wisconsin Highway 40

Territories

• Puerto Rico Highway 40
• U.S. Virgin Islands Highway 40

See also

• A40 (disambiguation)#Roads
• List of highways numbered 40A