Olympia is the capital of the U.S. state of Washington and the county seat of Thurston County. It was incorporated on January 28, 1859. The population was 46,478 as of the 2010 census. The city borders Lacey to the east and Tumwater to the south. Olympia is a cultural center of the southern Puget Sound region. Olympia is located 60 miles southwest of Seattle, the largest city in the state of Washington.