Olympia is the capital of the U.S. state of Washington and the county seat and most populous city of Thurston County. The Squaxin and other Coast Salish peoples inhabited the southern Puget Sound region prior to the arrival of European and American settlers in the 19th century. The Treaty of Medicine Creek was signed in 1854 and followed by the Treaty of Olympia in 1856; these two treaties forced the Squaxin to relocate to an Indian reservation. Olympia was incorporated as a town on January 28, 1859, and as a city in 1882. 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.

Country: United States
State: Washington
County: Thurston
Incorporated: January 28, 1859
Named for: Olympic Mountains
• Type: Council/City Manager
• Mayor: Dontae Payne (D)
• City: 55,605
• Estimate (2022): 55,669
• Rank: US: 718th, WA: 24th
• Urban: 208,157 (US: 182nd)
• Metro: 298,758 (US: 172nd)
Demonym(s): Olympian
Time zone: Pacific (PST) (UTC-8)
• Summer (DST): PDT (UTC-7)
ZIP codes: 98501–98509, 98511–98513, 98516, 98599
Area code: 360, 564
FIPS code: 53-51300
GNIS feature ID: 1533353
Website: olympiawa.gov
Official Website: http://www.olympiawa.gov/
Wikidata description: city in and county seat of Thurston County, Washington, United States, and Washington federated state capital city
Wikidata id: Q42735
Wikidata label: Olympia
Wikidata aliases: Array
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