[1] Hahn was born in Milwaukee but was raised in the Town of Springvale, Wisconsin.
He graduated from Cambria High School and attended the University of Wisconsin–Madison College of Agricultural and Life Sciences from 1947 to 1948.
[3] Hahn first became involved in politics in 1957, when he was elected assessor for the Town of Springvale.
In 1972, Hahn was elected to the Board of Supervisors for Columbia County, where he served until 1991.
This article about a Republican Party member of the Wisconsin State Assembly born in the 1920s is a stub.