Kent is a city located in King County, Washington, United States. It is the sixth largest city in the state and third largest in the county. Kent is in the heart of the Seattle–Tacoma metropolitan area, located 19 miles south of Seattle and 19 miles northeast of Tacoma. Incorporated in 1890, it is the second oldest incorporated city in King County, after Seattle. Kent's population as of April, 2010 was 92,411 according to the 2010 census. The total grew to an estimated 126,952 as of July 1, 2015, owing primarily to annexation.