William Louis Fiesinger (October 25, 1877 – September 11, 1953) was an American politician.

He graduated from the law department of Baldwin-Wallace University, Berea, Ohio, in 1901.

He served as judge of the Common Pleas Court of Erie County 1925-1931.

Fiesinger was elected as a Democrat to the Seventy-second, Seventy-third, and Seventy-fourth Congresses (March 4, 1931 – January 3, 1937).

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