Auburn is a city in King County and additionally Pierce County, Washington, United States; with the majority of spatial land area within King County. The population was 70,180 at the 2010 census; . Auburn is a suburb in the Seattle-Tacoma-Bellevue metropolitan area. Auburn is currently ranked the 14th largest city in the state of Washington.
Auburn is roughly bordered by the cities of Federal Way, Pacific, and Algona to the west, Sumner to the south, unincorporated King County to the east, and Kent to the north. The Muckleshoot Indian Reservation is located within southern city limits.
Auburn is located at 47°18′8″N 122°12′53″W / 47.30222°N 122.21472°W / 47.30222; -122.21472 (47.302322, -122.214779).