John W. DeGroff (October 12, 1843 – December 26, 1895) was an American politician, newspaper publisher, and businessman. He was a member of the Wisconsin State Senate and Assembly, representing Buffalo and Trempealeau counties. As a young man, he also served in the Union Army through most of the American Civil War.
DeGroff edited the Buffalo County Journal and the Marshfield Times. Additionally, he was a deputy state factory inspector at the time of his death.[1]
DeGroff was elected to the Wisconsin State Assembly in 1879. In 1886, he was elected to the Senate representing the 29th District.[3] He remained a member until 1891. Additionally, he was president of Alma and Clerk of Buffalo County, Wisconsin, as well as chairman of the Buffalo County Board. DeGroff was a Republican.