U.S. Route 331 or U.S. Highway 331 (US 331) is a United States Highway that is a spur auxiliary route of U.S. Route 31 in the states of Alabama and Florida. It currently runs for 150 miles (240 km) from Montgomery, Alabama at U.S. Route 80 / U.S. Route 82 / State Route 6 / State Route 8 / State Route 9 / State Route 21 to Santa Rosa Beach, Florida east of Fort Walton Beach at U.S. Route 98 / State Road 30 / State Road 83. Unlike U.S. Route 131, U.S. Route 231, and U.S. Route 431, U.S. 331 never intersects with its "parent" route, U.S. Route 31; the two routes come within 4 miles (6.4 km) of each other in Montgomery.