W. Patrick Donlin (May 12, 1937 – February 3, 1996) was an American lawyer and judge. He was one of the first judges of the Wisconsin Court of Appeals, serving from 1978 to 1981, and, before that, was a county and circuit judge in Price County, Wisconsin. He left the judiciary in 1981 to become supreme advocate (general counsel) of the Knights of Columbus, a title he held until his death.