Federal Way is a city in King County, Washington, United States. It is a city within the Seattle metropolitan area. The population was 89,306 at the 2010 census and an estimated 96,289 in 2019. Federal Way is the tenth largest city in Washington and the fifth largest in King County, according to the Census Bureau's 2019 population estimate.
Originally a logging settlement, the area was first called "Federal Way" in 1929. The name derived from Federal Highway U.S. 99 (now State Route 99 or Pacific Highway South), which ran from Everett and Seattle to Tacoma. The name "Federal Way" was first used in 1929 when five existing schools consolidated operations into School District #210 and planned construction of Federal Way High School, which opened in 1930 and gave its name to the school district. The local chamber of commerce adopted the name in the early 1950s.
Attempts to incorporate the city were voted down in 1971, 1981 and 1985. The voters eventually approved incorporation as a city on February 28, 1990; the official act of incorporation was held at the Sportsworld Lanes bowling complex.
Until 2014, Federal Way was home to Weyerhaeuser, the largest private owner of softwood timberland in the world. Weyerhaeuser had opened much of its land in Federal Way to the public, including two botanical gardens: the Rhododendron Species Foundation and Botanical Garden, and the Pacific Bonsai Museum.