Jack Blackman (29 January 1920 – 15 June 1978) was an Australian rules footballer who played for Hawthorn in the VFL during the 1940s. Blackman was a centre half back and first played for Hawthorn in 1939. He didn't play between 1940 and 1944 due to his war service in the Navy. When he returned in 1944 he did not miss a game all season and won Hawthorn's best and fairest. In 1947, Blackman crossed to Victorian Football Association club Preston as captain-coach without a clearance. He played there under throw-pass rules for three years, and he won the J. J. Liston Trophy in 1949. The following year he transferred to play for Horsham.