Chehalis County was a county formed out of Thurston County in Washington State. It would later be known as Grays Harbor County.
History[]
Chehalis County was formed out of Thurston County on April 14, 1854. The name was subsequently changed to Grays Harbor County by the Washington legislature, effective June 9, 1915. The name change helped eliminate confusion resulting from the fact that the city named Chehalis was in Lewis County.