List of highways numbered 51

The following highways are numbered 51:

Australia

 * Kamilaroi Highway
 * Plenty Road

Cambodia

 * National Road 51 (Cambodia)

Canada

 * Alberta Highway 51 (1970s).svg Alberta Highway 51 (defunct)
 * Saskatchewan Highway 51 (jct).svg Saskatchewan Highway 51

Finland

 * Finland road sign F30-51.svg Finnish national road 51

France

 * A51 autoroute

Hungary

 * M51 (Hu) Otszogletu kek tabla.svg M51 expressway (Hungary)

India

 * NH51-IN.svg National Highway 51 (India)

Iran

 * IR Freeway 51 sign.svg Zobahan Freeway
 * Iran First Level Road 51.png Road 51

Italy

 * Autostrada A51 Italia.svg Autostrada A51

Japan

 * Japanese National Route Sign 0051.svg Japan National Route 51

New Zealand

 * State Highway 51 NZ.svg New Zealand State Highway 51

Philippines

 * N51 (Philippines).svg N51 highway (Philippines)

South Africa

 * SA road R51.svg R51

Turkey

 * O51-TR sign.svg, a motorway in Turkey running from Adana to Mersin.

United Kingdom

 * UK road A51.svg British A51 (Kingsbury-Chester)

United States

 * US 51.svg U.S. Route 51
 * Alabama 51.svg Alabama State Route 51
 * Arizona 51.svg Arizona State Route 51
 * Arkansas 51.svg Arkansas Highway 51
 * California 51.svg California State Route 51 (unsigned)
 * Colorado 51.svg Colorado State Highway 51 (1923-1968) (former)
 * Florida 51.svg Florida State Road 51
 * Hamilton County Road 51 FL.svg County Road 51 (Hamilton County, Florida)
 * Georgia 51.svg Georgia State Route 51
 * Georgia 51.svg Georgia State Route 51 (1920) (former)
 * HI-51.svg Hawaii Route 51
 * ID-51.svg Idaho State Highway 51
 * Illinois 51.svg Illinois Route 51 (former)
 * Indiana 51.svg Indiana State Road 51
 * Iowa 51.svg Iowa Highway 51
 * K-51.svg K-51 (Kansas highway)
 * MD Route 51.svg Maryland Route 51
 * Maryland Route 51A
 * Maryland Route 51B (former)
 * Maryland Route 51C (former)
 * Maryland Route 51D
 * Maryland Route 51E
 * Maryland Route 51F
 * M-51.svg M-51 (Michigan highway)
 * MN-51.svg Minnesota State Highway 51
 * Anoka County 51.svg County Road 51 (Anoka County, Minnesota)
 * County 51 (MN).svg County Road 51 (Ramsey County, Minnesota)
 * MO-51.svg Missouri Route 51
 * N-51.svg Nebraska Highway 51
 * N LINK 51A.svg Nebraska Link 51A
 * N LINK 51B.svg Nebraska Link 51B
 * N LINK 51C.svg Nebraska Link 51C
 * N REC 51E.svg Nebraska Recreation Road 51E
 * N REC 51F.svg Nebraska Recreation Road 51F
 * N REC 51G.svg Nebraska Recreation Road 51G
 * N REC 51H.svg Nebraska Recreation Road 51H
 * Nevada 51.svg Nevada State Route 51
 * NH Route 51.svg New Hampshire Route 51
 * NJ 51 (cutout).svg New Jersey Route 51 (former)
 * Bergen County Route 51 NJ.svg County Route 51 (Bergen County, New Jersey)
 * Bergen County Route S-51 NJ.svg County Route S51 (Bergen County, New Jersey)
 * Monmouth County Route 51 NJ.svg County Route 51 (Monmouth County, New Jersey)
 * New Mexico 51.svg New Mexico State Road 51
 * NY-51.svg New York State Route 51
 * CR 51 jct.svg County Route 51 (Cayuga County, New York)
 * Dutchess County Route 51 NY.svg County Route 51 (Dutchess County, New York)
 * Erie County Route 51 NY.svg County Route 51 (Erie County, New York)
 * Essex County Route 51 NY.svg County Route 51 (Essex County, New York)
 * Franklin County 51 NY.svg County Route 51 (Franklin County, New York)
 * CR 51 jct.svg County Route 51 (Greene County, New York)
 * CR 51 jct.svg County Route 51 (Herkimer County, New York)
 * CR 51 jct.svg County Route 51 (Madison County, New York)
 * CR 51 jct.svg County Route 51 (Oneida County, New York)
 * CR 51 jct.svg County Route 51 (Orange County, New York)
 * Putnam County Route 51 NY.svg County Route 51 (Putnam County, New York)
 * Rensselaer County Route 51 NY.svg County Route 51 (Rensselaer County, New York)
 * Rockland County Route 51 NY.svg County Route 51 (Rockland County, New York)
 * Saratoga County Route 51 NY.svg County Route 51 (Saratoga County, New York)
 * CR 51 jct.svg County Route 51 (Schoharie County, New York)
 * Suffolk County Route 51 NY.svg County Route 51 (Suffolk County, New York)
 * Sullivan County Route 51 NY.svg County Route 51 (Sullivan County, New York)
 * CR 51 jct.svg County Route 51 (Ulster County, New York)
 * NC 51.svg North Carolina Highway 51
 * OH-51.svg Ohio State Route 51
 * Oklahoma State Highway 51.svg Oklahoma State Highway 51
 * Oklahoma State Highway 51A.svg Oklahoma State Highway 51A
 * Oklahoma State Highway 51B.svg Oklahoma State Highway 51B
 * OR 51.svg Oregon Route 51
 * PA-51.svg Pennsylvania Route 51
 * Rhode Island 51.svg Rhode Island Route 51
 * South Carolina 51.svg South Carolina Highway 51
 * Secondary Tennessee 51.svg Tennessee State Route 51
 * Texas 51.svg Texas State Highway 51
 * Texas Spur 51.svg Texas State Highway Spur 51
 * Texas FM 51.svg Farm to Market Road 51
 * Texas Park Road 51.svg Texas Park Road 51
 * Utah SR 51.svg Utah State Route 51
 * Virginia 51.svg Virginia State Route 51
 * Virginia 51.svg Virginia State Route 51 (1928-1950) (former)
 * WV-51.svg West Virginia Route 51
 * WV-51.svg West Virginia Route 51 (1920s) (former)
 * WV-51.svg West Virginia Route 51 (1930s) (former)
 * WIS 51.svg Wisconsin Highway 51 (former)
 * WY-51.svg Wyoming Highway 51

Vietnam

 * National Road 51 (Vietnam)