Shelton is a city located in the state of Washington in the United States. It serves as the county seat for Mason County and holds the distinction of being the westernmost city situated on Puget Sound.
As of the 2020 census, the city had a population of 10,371 residents. The local government operates under a council-manager form of government; notably, Shelton was the final city in Washington to transition from a mayor-commission form of government.