Olympia is the capital city of the U.S. state of Washington and the county seat of Thurston County. It had a population of 55,605 at the time of t…Olympia is the capital city of the U.S. state of Washington and the county seat of Thurston County. It had a population of 55,605 at the time of the 2020 census, making it the state of Washington's 23rd-most populous city. Olympia borders Lacey to the east and Tumwater to the south.
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