State Route 105 (SR 105) is a state highway in the U.S. state of Washington. It travels 48 miles (77 km) along the Pacific Coast between two junctions with U.S. Route 101 (US 101) in Raymond to the south and Aberdeen in the north. The highway also has two spur routes: a 4-mile (6 km) road serving the city of Westport on Grays Harbor and a short connector in Aberdeen.