John A. Decker (July 20, 1915 - August 16, 2006)[1] was Chief Judge of the Wisconsin Court of Appeals.
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.