The following highways are numbered 366:
Brazil 25px
Canada Manitoba Provincial Road 366 Nova Scotia Route 366 Quebec Route 366
India National Highway 366 (India)
Japan Route 366 (Japan)
Malaysia
Federal Route 366
United States U.S. Route 366 U.S. Route 366 (1926) U.S. Route 366 (1932–1939) Arizona State Route 366 Florida State Road 366 Georgia State Route 366 (former) Hawaii Route 366 Louisiana Highway 366 Maryland Route 366 Mississippi Highway 366 Missouri Route 366 New York State Route 366 Ohio State Route 366 Pennsylvania Route 366 Texas State Highway Spur 366 Virginia State Route 366 Territories Puerto Rico Highway 366