Aberdeen, WASH., the chief city of Chehalis co., is situated at the head of nagivation on the Chehalis River and on branches of the Northern Pacific and Chicago, Milwaukee and Puget Sound railroads. It is at the head of Gray's Harbor and has an important ocean and inland trade. It is an important lumbering center, containing large sawmills, shingle mills and canning factories. Population in 1910, 13,660. Population in 2002, 16,271.