South Sound is in Puget Sound within Washington. Regions South Sound consists of Pierce County and Thurston County as well as Olympia, the state capitol Cities Fife Lakewood Ft. Lewis Parkland Spanaway Puyallup Steilacoom Sumner Tacoma — County seat of Pierce County Lacey Olympia — capital of Washington state and county seat of Thurston County Tumwater DuPont Other destinations Mount Rainier National Park - premier natural site in Washington State Crystal Mountain — ski resort Understand Get in Get around See Do Eat Drink Stay safe Go next