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 United States Census.
Auburn was originally incorporated as Slaughter, Washington after Lt. William Slaughter, who died in a skirmish fighting Native Americans which are now apart of the modern day Muckleshoot tribe in 1855.In 1893, a large group of settlers from Auburn, New York, moved to Slaughter, and renamed the town to "Auburn." A monument in the memory of Lieutenant Slaughter, erected in 1918, still stands in a local park. The Neely Mansion, built by the son of a pioneer in 1891, has been refurbished and is listed on the National Register of Historic Places. Auburn's downtown still maintains a "Main Street U.S.A." appearance.