List of highways numbered 51

The following highways are numbered 51:

Cambodia

• National Road 51 (Cambodia)

Canada

• Alberta Highway 51 (defunct)
• Saskatchewan Highway 51

Iran

• Road 51

Japan

• Route 51 (Japan)

United Kingdom

• British A51 (Kingsbury-Chester)

United States

• U.S. Route 51
• Alabama State Route 51
• Arizona State Route 51
• Arkansas Highway 51
• California State Route 51 (former)
• Florida State Road 51
• Georgia State Route 51
• Hawaii Route 51
• Idaho State Highway 51
• Illinois Route 51 (former)
• Indiana State Road 51
• Iowa Highway 51
• K-51 (Kansas highway)
• Maryland Route 51
• M-51 (Michigan highway)
• Minnesota State Highway 51
• Missouri Route 51
• Nebraska Highway 51
• Nevada State Route 51 (former)
• New Hampshire Route 51
• New Jersey Route 51 (former)
• New Mexico State Road 51
• New York State Route 51
• North Carolina Highway 51
• Ohio State Route 51
• Oklahoma State Highway 51
  • Oklahoma State Highway 51A
  • Oklahoma State Highway 51B
• Oregon Route 51
• Pennsylvania Route 51
• Rhode Island Route 51
• South Carolina Highway 51
• Tennessee State Route 51
• Texas State Highway 51
  • Texas State Highway Spur 51
  • Farm to Market Road 51 (Texas)
  • Texas Park Road 51
• Utah State Route 51
• Virginia State Route 51
• West Virginia Route 51
• Wisconsin Highway 51 (former)
• Wyoming Highway 51

Vietnam

• National Road 51 (Vietnam)

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