The following highways are numbered 291:
Canada Manitoba Provincial Road 291 Quebec Route 291
Japan Japan National Route 291
United States Interstate 291 (multiple highways) Alabama State Route 291 Arkansas Highway 291 Colorado State Highway 291 Florida State Road 291 Georgia State Route 291 (former) Kentucky Route 291 Maryland Route 291 Minnesota State Highway 291 Missouri Route 291 Montana Secondary Highway 291 (former) Nevada State Route 291 (former designation for Nevada State Route 140) New Mexico State Road 291 New York State Route 291 New York State Route 291 (former) Ohio State Route 291 Pennsylvania Route 291 South Carolina Highway 291 Tennessee State Route 291 Texas: Texas State Highway 291 (former) Texas State Highway Loop 291 Farm to Market Road 291 Utah State Route 291 Washington State Route 291 Wyoming Highway 291