Tacoma is a city in and the county seat of Pierce County, Washington, United States. A port city, it is situated along Puget Sound roughly 30 miles (48 km) from Seattle and Olympia, and 58 miles (93 km) northwest of Mount Rainier National Park. Tacoma is the second-largest city in the Puget Sound area and the third-most populous city in the state with a population of 219,346 at the 2020 census. Tacoma is the economic and cultural center of the South Sound region, which has a population of about 1 million.