Des Moines ( də-MOYNZ) is a city in King County, Washington, United States. The population was 32,888 as of the 2020 census. The city is located on the east shore of Puget Sound, near the center of the Seattle metropolitan area. It is bordered by the suburbs of Federal Way to the south, Kent to the east, SeaTac to the northeast, Burien to the north, and Normandy Park to the northwest.

Des Moines is one of the few points along this shoreline where the topography facilitates access to the water, and a recreational marina operated by the city, with moorage, boat launching and pier fishing facilities, is located there. Forested Saltwater State Park on a steep ravine between the Zenith and Woodmont neighborhoods is the most-used state park on the Sound. Near the border of Federal Way, Redondo has a board-walk complete with a Salty's restaurant and a pay parking lot.