The following highways are numbered 191:

• New Brunswick Route 191
• Quebec Route 191

• Road to Peñalver (2–191)
• Road of Turiguanó (5-191)

• Japan National Route 191

• N191 highway (Philippines)

• A191 road
• B191 road

• U.S. Route 191
• Alabama State Route 191
• Arkansas Highway 191
• California State Route 191
• Connecticut Route 191
• Florida State Road 191 (former)
• Georgia State Route 191
• Iowa Highway 191
• K-191 (Kansas highway)
• Kentucky Route 191
• Maine State Route 191
• Maryland Route 191
• M-191 (Michigan highway) (former)
• Montana Highway 191 (former)
• New York State Route 191
• North Carolina Highway 191
• Ohio State Route 191
• Pennsylvania Route 191
• South Carolina Highway 191
• Tennessee State Route 191
• Texas State Highway 191
  • Texas State Highway Spur 191
  • Farm to Market Road 191 (Texas)
• Utah State Route 191
• Vermont Route 191
• Virginia State Route 191
• Wisconsin Highway 191
• Wyoming Highway 191

Territories

• Forest Highway 191 (Puerto Rico)