John A. Decker (July 20, 1915 - August 16, 2006)[1] was Chief Judge of the Wisconsin Court of Appeals.
A native of Milwaukee, Wisconsin, Decker graduated from the University of Wisconsin Law School.[2] Decker died in 2006. His wife, Margaret, predeceased him. They had one son, who followed his father into law.
Prior to serving on the Court of Appeals, Decker worked with a private practice, was City Attorney of Milwaukee and was a Wisconsin Circuit Court Judge. Decker joined the Court of Appeals in 1978 and immediately became Chief Judge. He remained Chief Judge until 1983 and retired from full-time judicial duties in 1984, though he was a reserve judge afterwards. Decker was also a member of the faculty of Marquette University Law School and the University of Nevada, Reno.