John Wilson Cassingham (June 22, 1840 – March 14, 1930) was a U.S. Representative from Ohio for two terms from 1901 to 1905.

Born in Coshocton, Ohio, Cassingham attended the public schools.

Reengaged in his former business interests in Coshocton until 1915, when he retired from active pursuits.

He died in Coshocton on March 14, 1930, and was interred in South Lawn Cemetery.

This article incorporates public domain material from the Biographical Directory of the United States Congress