Jack Warren Munn (1921–1993) was an Australian rugby league player who played in the 1940s and 1950s in the New South Wales premiership competition and was a state representative.

Munn was a prop-forward who played with St. George immediately after World War II.

After his discharge from the AIF,[2] Jack Munn joined St George and played five seasons between 1946-1949 and 1951.

Munn scored a try in the club's 1946 Grand final loss to Balmain.

He won a premiership with St. George when he played prop in the 1949 Grand Final.