Charles F. Crosby (December 12, 1847 – December 1, 1889) was an American politician and lawyer from Minnesota and Wisconsin. Born in the town of Waterloo, in Jefferson County, Wisconsin, Crosby moved with his family to Dell Prairie, Wisconsin. He then moved to Minnesota in 1872. Crosby moved to Wausau, Wisconsin, where he practiced law. In 1881–1882, Crosby served in the Wisconsin State Senate and later served as a justice of the peace. He died in Wausau.