William J Duffy

William J. Duffy (October 29, 1916 – February 25, 2013) was an American jurist and legislator.

Born in North Branch, Minnesota, Duffy grew up in Hollandtown, Wisconsin and graduated from Kaukauna High School. He graduated from St. Norbert College and received his law degree from the University of Wisconsin Law School. He served in the United States Army Air Forces during World War II. He then practiced law in Green Bay, Wisconsin. He served in the Wisconsin State Assembly from 1949 to 1950 as a Democrat. Duffy was elected a Wisconsin Circuit Court judge for Brown County, Wisconsin serving until his retirement in 1992. He died in Green Bay, Wisconsin.