William H. Markham was a member of the Wisconsin State Senate.
[1] He attended Lawrence College and the University of Minnesota and was later active in the preservation of the Horicon Marsh.
Previously, he had been an alderman, City Attorney and Mayor of Horicon, Wisconsin.
During the United States Senate elections, 1928, Markham was an Independent candidate, losing to incumbent Robert M. La Follette Jr.
In 1948, Markham ran for the Republican nomination for Secretary of State of Wisconsin, losing to incumbent Fred R.