List of highways numbered 66

• Barkly Highway (Northern Territory)
• Riddoch Highway

• Alberta Highway 66
• Highway 66 (Ontario)

• Kantatie 66 (Orivesi — Lapua)

• A66 autoroute

• Bundesautobahn 66

• Greek National Road 66, a national highway connecting Nemea with Levidi via Skoteini

• 66-os főút (Kaposvár - Pécs)

66

National Highway 66 (India)

• N66

• Highway 66 (Israel)

• Malaysia Federal Route 66

• N66 highway (Philippines)

• Road 66 (Slovakia), from Slovak - Hungarian border at Šahy to Tatras mountain

• Autovía A-66 (Silver Route)

• E 66

• A66 road
• M66 motorway

• Interstate 66, a highway connecting Interstate 81 in Virginia to Washington, D.C.
  • Interstate 66 (Kansas–Kentucky), a former proposed highway to connect Kansas with Kentucky
• U.S. Route 66, the most common meaning. Since 1985, when US 66 was decommissioned, several states where US 66 passed have re-commissioned part of the former route in that state as a state route 66. In the list of state routes 66 below, those marked with an asterisk (*) have a connection with the former US 66.
• Alabama State Route 66
• Arizona State Route 66*
• Arkansas Highway 66
• California State Route 66*
• Colorado State Highway 66
• Connecticut Route 66
• Florida State Road 66
• Georgia State Route 66
• Hawaii Route 66
• Idaho State Highway 66
• Illinois Route 66 is now Illinois 126*
• Indiana State Road 66
• Iowa Highway 66
• K-66 (Kansas highway)*
• Kentucky Route 66
• Louisiana Highway 66
• Maryland Route 66
• Massachusetts Route 66
• M-66 (Michigan highway)
• Minnesota State Highway 66
  • County Road 66 (Hennepin County, Minnesota)
• Missouri Route 66*
• Missouri Route 66 (1922), a pre-1926 highway not connected to US 66
• Montana Highway 66
• Nebraska Highway 66
  • Nebraska Spur 66A
  • Nebraska Spur 66C
  • Nebraska Spur 66D
  • Nebraska Spur 66E
• Nevada State Route 66 (former)
• New Jersey Route 66
• New York State Route 66
  • County Route 66A (Cayuga County, New York)
    • County Route 66B (Cayuga County, New York)
  • County Route 66 (Chautauqua County, New York)
  • County Route 66 (Dutchess County, New York)
  • County Route 66 (Jefferson County, New York)
  • County Route 66 (Monroe County, New York)
  • County Route 66 (Onondaga County, New York)
  • County Route 66 (Putnam County, New York)
  • County Route 66 (Rensselaer County, New York)
  • County Route 66 (Saratoga County, New York)
  • County Route 66 (Schoharie County, New York)
  • County Route 66 (Suffolk County, New York)
  • County Route 66 (Sullivan County, New York)
  • County Route 66A (Westchester County, New York)
• North Carolina Highway 66
• North Dakota Highway 66
• Ohio State Route 66
• Oklahoma State Highway 66*
  • Oklahoma State Highway 66B*
• Oregon Route 66
• Pennsylvania Route 66
• Puerto Rico Highway 66
• South Carolina Highway 66
• Tennessee State Route 66
• Texas State Highway 66 (no connection to Texas portion of US 66)
  • Texas State Highway Loop 66 (former)
  • Texas State Highway Spur 66
  • Farm to Market Road 66
  • Texas Park Road 66
• U.S. Virgin Islands Highway 66
• Utah State Route 66
• Vermont Route 66
• Virginia State Route 66 (former)
• West Virginia Route 66
• Wisconsin Highway 66

• A66 (disambiguation)