List of highways numbered 91

International

• European route E91

  Australia

• Cairns Western Arterial Road
• Summerland Way

  Canada

• British Columbia Highway 91
• Newfoundland and Labrador Route 91

  China

• G91 Expressway

  Iran

• Road 91

  Israel

• Highway 91

  Korea, South

• National Route 91

  United States

• Interstate 91
• U.S. Route 91
• Alabama State Route 91
• Arkansas Highway 91
• California State Route 91
• Colorado State Highway 91
• Florida State Road 91
• Georgia State Route 91
• * Georgia State Route 91W
• Illinois Route 91
• Iowa Highway 91
• Kentucky Route 91
• Louisiana Highway 91
• * Louisiana State Route 91
• Maine State Route 91
• Maryland Route 91
• *Maryland Route 91A
• M-91
• Minnesota State Highway 91
• * County Road 91
• Missouri Route 91
• Nebraska Highway 91
• * Nebraska Link 91D
• * Nebraska Spur 91A
• * Nebraska Spur 91B
• Nevada State Route 91
• New Jersey Route 91
• * County Route 91
• New Mexico State Road 91
• New York State Route 91
• * County Route 91
• * County Route 91
• * County Route 91
• * County Route 91
• * County Route 91
• * County Route 91
• * County Route 91
• * County Route 91
• * County Route 91
• * County Route 91
• North Carolina Highway 91
• North Dakota Highway 91
• Ohio State Route 91
• Oklahoma State Highway 91
• Pennsylvania Route 91
• Rhode Island Route 91
• Tennessee State Route 91
• Texas State Highway 91
• * Texas State Highway Spur 91
• * Farm to Market Road 91
• Utah State Route 91
• Virginia State Route 91
• Wisconsin Highway 91
• Wyoming Highway 91

  Vietnam

• National Road 91