Poskin (also Cosgrove, Poskin Lake) is an unincorporated community in the town of Clinton, Barron County, Wisconsin, United States. Poskin is located on U.S. Route 8  west of Barron.

History
Poskin was platted in 1887, and named for Mary Poskin, the wife of a businessperson in the lumber industry. Poskin had a post office, which opened on March 30, 1887, and closed on July 10, 1993.

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Unincorporated communities in Barron County, Wisconsin
Unincorporated communities in Wisconsin