Jack Marshall (disambiguation) explained

Jack Marshall (1912–1988) was Prime Minister of New Zealand.

Jack Marshall may also refer to:

Sports

Jack Marshall (ice hockey) (1877–1965), Canadian ice hockey player
Jack Marshall (pitcher) (1893–?), Negro leagues baseball pitcher
Jack Marshall (second baseman) (1908–1990), American Negro league baseball player
Jack Marshall (soccer) (1892–1964), American soccer player
Jack Marshall (cricketer) (1916–2000), English cricketer
Jack Marshall (footballer, born 1917) (1917–1998), English football manager
Jack Marshall (footballer, born 1895) (1895–1968), English footballer
Jack Marshall (rugby union) (1926–2013), represented Australia

Jack Marshall (Canadian politician) (1919–2004)
Jack Marshall (composer) (1921–1973), American guitarist, conductor, and composer
Jack Marshall (author) (born 1936), American poet and author

Jack Marshall, fictional protagonist of The Hacker Files, a DC Comics mini-series