Jack Mills (disambiguation)
Jack Mills was the train driver in the Great Train Robbery.
Jack Mills may also refer to:
- Jack Mills (art director), American set decorator
- Jack Mills (baseball) (1889–1973), Major League Baseball third baseman
- John Mills (cricketer, born 1905), sometimes known as Jack Mills
- Jack Mills (English footballer) (born 1992), English soccer player
- Jack Mills (Australian footballer) (born 1930), former Australian rules footballer
- Jack Mills (classification researcher) (1918–2010), British librarian and classification researcher
- Jack Mills, co-founder and co-owner (with his brother Irving Mills) of Mills Music, a music publisher founded in the 1920s