The following highways are numbered 137:

Canada

• Ontario Highway 137
• Prince Edward Island Route 137
• Quebec Route 137

Costa Rica

• National Route 137

Japan

• Japan National Route 137
• Fukuoka Prefectural Route 137
• Nara Prefectural Route 137

Malaysia

• Malaysia Federal Route 137

United States

• Alabama State Route 137
• Arkansas Highway 137
• California State Route 137
• Connecticut Route 137
• Florida State Road 137 (former)
  • County Road 137 (Hamilton County, Florida)
  • County Road 137 (Suwannee County, Florida)
• Georgia State Route 137
• Hawaii Route 137
• Illinois Route 137
• Iowa Highway 137
• K-137 (Kansas highway)
• Kentucky Route 137
• Louisiana Highway 137 (former)
• Maine State Route 137
• Maryland Route 137
• Massachusetts Route 137
• M-137 (Michigan highway) (former)
• Missouri Route 137
• Nebraska Highway 137
• New Hampshire Route 137
• New Mexico State Road 137
• New York State Route 137
  • County Route 137 (Cortland County, New York)
  • County Route 137 (Erie County, New York)
  • County Route 137 (Fulton County, New York)
  • County Route 137 (Niagara County, New York)
  • County Route 137 (Schenectady County, New York)
  • County Route 137 (Westchester County, New York)
• North Carolina Highway 137
• Ohio State Route 137
• Oklahoma State Highway 137
• Pennsylvania Route 137 (former)
• South Carolina Highway 137
• Tennessee State Route 137
• Texas State Highway 137
  • Texas State Highway Loop 137 (two former highways)
  • Farm to Market Road 137
• Utah State Route 137
• Virginia State Route 137
  • Virginia State Route 137 (1930-1932) (former)
• Wisconsin Highway 137
• Wyoming Highway 137 (former)