The following highways are numbered 56:

International

• E56 European route E56

Australia

• Oxley Highway

Canada

• Alberta Highway 56
• Saskatchewan Highway 56

China

• G56 Expressway

Czech Republic

• R56 Expressway

India

• National Highway 56 (India)

Iran

• Road 56

Italy

• Autostrada A56

Japan

• Japan National Route 56

Korea, South

• National Route 56
• Gukjido 56

New Zealand

• New Zealand State Highway 56

Philippines

• N56 highway (Philippines)

United Kingdom

• British A56 (Chester-Broughton)
• British M56 (Cheadle-Mollington)

United States

• Interstate 56 (former proposal)
• U.S. Route 56
• Alabama State Route 56
• Arkansas Highway 56
• California State Route 56
• Colorado State Highway 56
• Florida State Road 56
• Georgia State Route 56
• Hawaii Route 56
• Illinois Route 56
• Indiana State Road 56
• Iowa Highway 56
• Kentucky Route 56
• Louisiana Highway 56
  • Louisiana State Route 56 (former)
• Maryland Route 56
• Massachusetts Route 56
• Michigan:
  • M-56 (1919–1957 Michigan highway) (former)
  • M-56 (1971–1987 Michigan highway) (former)
• Minnesota State Highway 56
  • County Road 56 (Chisago County, Minnesota)
  • County Road 56 (Dakota County, Minnesota)
  • County Road 56 (St. Louis County, Minnesota)
• Missouri Route 56 (1922) (former)
• Montana Highway 56
• Nebraska Highway 56
  • Nebraska Link 56C
  • Nebraska Link 56D
  • Nebraska Link 56G
  • Nebraska Recreation Road 56E
  • Nebraska Recreation Road 56F
• Nevada State Route 56
• New Jersey Route 56
  • County Route 56 (Bergen County, New Jersey)
  • County Route 56 (Monmouth County, New Jersey)
• New York State Route 56
  • County Route 56 (Dutchess County, New York)
  • County Route 56 (Essex County, New York)
  • County Route 56 (Jefferson County, New York)
  • County Route 56 (Niagara County, New York)
  • County Route 56 (Oneida County, New York)
  • County Route 56 (Onondaga County, New York)
  • County Route 56 (Oswego County, New York)
  • County Route 56 (Putnam County, New York)
  • County Route 56 (Rensselaer County, New York)
  • County Route 56 (Saratoga County, New York)
  • County Route 56 (Suffolk County, New York)
• North Carolina Highway 56
• North Dakota Highway 56
• Ohio State Route 56
• Oklahoma State Highway 56
  • 
    Oklahoma State Highway 56 Loop
• Pennsylvania Route 56
• South Carolina Highway 56
• Tennessee State Route 56
• Texas State Highway 56
  • Texas State Highway Spur 56
  • Farm to Market Road 56 (Texas)
  • Texas Park Road 56
• Utah State Route 56
• Vermont Route 56 (former)
• Virginia State Route 56
• West Virginia:
  • West Virginia Route 56 (1920s) (former)
  • West Virginia Route 56 (1930s) (former)
• Wisconsin Highway 56