List of highways numbered 20

• E20 European route E20

• Sturt Highway (NSW/VIC/SA)
• Yarra Bank Highway

• BR-020

• Alberta Highway 20
• British Columbia Highway 20
• Manitoba Highway 20
• New Brunswick Route 20 (former)
• Newfoundland and Labrador Route 20
• Ontario Highway 20
• Prince Edward Island Route 20
• Quebec Autoroute 20
• Saskatchewan Highway 20

• G20 Expressway

• I/20 Highway; Czech: Silnice I/20

• Ecuador Highway 20

20

National Highway 20 (India)

• Ayalon Highway

• Japan National Route 20
• Chūō Expressway

• Iksan–Pohang Expressway
• National Route 20
• Gukjido 20

• New Zealand State Highway 20 (Auckland Southwestern Motorway)

• O-20, a motorway in Turkey as the ring road in Ankara.

• British A20 (London-Dover)
• British M20 (Swanley-Folkestone)

• Interstate 20
• U.S. Route 20
  • U.S. Route 20N (former)
  • U.S. Route 20S (former)
• New England Route 20 (former)
• Alabama State Route 20
• Arkansas Highway 20
• California State Route 20
  • County Route A20 (California)
  • County Route E20 (California)
  • County Route G20 (California)
  • County Route J20 (California)
  • County Route S20 (California)
• Connecticut Route 20
• Delaware Route 20
• Florida State Road 20
• Georgia State Route 20
  • Georgia State Route 20 (former)
  • Georgia State Route 20 (former)
• Illinois Route 20 (former)
• K-20 (Kansas highway)
• Kentucky Route 20
• Louisiana Highway 20
  • Louisiana State Route 20
• Maryland Route 20
• Massachusetts Route 20
• M-20 (Michigan highway)
• Minnesota State Highway 20
  • County Road 20 (Goodhue County, Minnesota)
• Missouri Route 20
• Nevada State Route 20 (former)
• New Jersey Route 20
  • County Route 20 (Monmouth County, New Jersey)
• New Mexico State Road 20
• New York State Route 20 (1924–1927) (former)
  • New York State Route 20N (former)
  • New York State Route 20SY (former)
  • County Route 20 (Allegany County, New York)
  • County Route 20 (Clinton County, New York)
  • County Route 20 (Columbia County, New York)
  • County Route 20 (Delaware County, New York)
  • County Route 20 (Dutchess County, New York)
  • County Route 20 (Genesee County, New York)
  • County Route 20 (Livingston County, New York)
  • County Route 20 (Niagara County, New York)
  • County Route 20 (Ontario County, New York)
  • County Route 20 (Orange County, New York)
  • County Route 20 (Oswego County, New York)
  • County Route 20 (Otsego County, New York)
  • County Route 20 (Putnam County, New York)
  • County Route 20 (Rensselaer County, New York)
  • County Route 20 (Rockland County, New York)
  • County Route 20 (Suffolk County, New York)
  • County Route 20 (Ulster County, New York)
  • County Route 20 (Washington County, New York)
  • County Route 20 (Yates County, New York)
• North Carolina Highway 20
• North Dakota Highway 20
• Ohio State Route 20 (1923-1927) (former)
• Oklahoma State Highway 20
• South Carolina Highway 20
• South Dakota Highway 20
• Tennessee State Route 20
• Texas State Highway 20
  • Texas State Highway Loop 20
  • Farm to Market Road 20
  • Texas Park Road 20
• Utah State Route 20
• Virginia State Route 20
• Washington State Route 20
• West Virginia Route 20
• Wisconsin Highway 20

Territories

• Puerto Rico Highway 20
• U.S. Virgin Islands Highway 20

• List of A20 roads
• List of highways numbered 20A
• List of highways numbered 20B
• List of highways numbered 20C
• List of highways numbered 20D