John Eaton "Jack" Manchester (29 January 1908 – 6 September 1983) was a New Zealand rugby union player. A flanker, Manchester played club rugby for Christchurch and represented Canterbury at a provincial level. He was a member of the New Zealand national side, the All Blacks, from 1932 to 1936, and played 36 matches—20 as captain—for the All Blacks including nine internationals. He later coached the Otago University club from 1947 to 1952, having moved to Dunedin after World War II.
Manchester died in Dunedin on 6 September 1983.