The Seattle metropolitan area in Washington, USA includes the city of Seattle, King County, Snohomish County, and Pierce County within the Puget Sound area. The U.S. Census Bureau defines the metropolitan area as the Seattle-Tacoma-Bellevue, WA Metropolitan Statistical Area, with an estimated population of 3.2 million, making it the 15th largest United States metropolitan area. Seattle apartments for rent comparison page shows most up to date rent information on Seattle apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.