Edgewood is a city in Pierce County, Washington, United States. The population was 12,327 at the 2020 census. Neighboring towns includ…Edgewood is a city in Pierce County, Washington, United States. The population was 12,327 at the 2020 census. Neighboring towns include Fife to the west, Milton to the northwest, Federal Way to the north, Sumner to the east, and Puyallup to the south.