Warren Joseph Duffey (January 24, 1886 – July 7, 1936) was an American lawyer and politician from Ohio who was elected to two terms in the United States House of Representatives, serving from 1933 to 1936.

Duffey was admitted to the bar the same year and commenced the practice of law in Toledo, Ohio.

Duffey served in the Ohio House of Representatives in 1913 and 1914 and as a member of the Toledo City Council in 1917 and 1918.

Duffey was elected as a Democrat to the Seventy-third and Seventy-fourth Congresses and served from March 4, 1933, until his death.

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