Thurston County, Washington
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Thurston County is a county located in the U.S. state of Washington. As of the 2020 census, its population was 294,793. The county seat is Olympia, the state capital.
Former Thurston County Courthouse in summer 2025
Old Capitol Building in Olympia.
Aerial view of Olympia, the county seat of and largest city in Thurston County
Pierce County, Washington
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Pierce County is a county in the U.S. state of Washington. As of the 2020 census, the population was 921,130, and was estimated to be 946,288 in 2025, making it the second-most populous county in Wash
Thurston County, Washington
…Oregon Territory on January 12, 1852. At that time, it covered all of the Puget Sound region and the Olympic Peninsula. On December 22 of the same year, Pierce, King, Island, and Jefferson counties were split off from Thurston County. It is named after Samuel R. Thurston, the Oregon Territory's first delegate…
The Old City Hall in Tacoma
Mount Rainier from Ricksecker Point, 1932
Tacoma—seat of Pierce County
Pierce County operates ferries to Anderson Island and Ketron Island