Others
- John Montgomery (pioneer) (died 1794), U.S. pioneer in Tennessee
- John Montgomery (tavern-keeper) (1788-1879), Canadian tavern-keeper in 1837 Rebellion
- John Joseph Montgomery (1858–1911), U.S. pioneer in aviation
- John Montgomery (equestrian) (1881–1949), American horse rider and Olympic medalist
- John Michael Montgomery (born 1965), country singer
- John Warwick Montgomery (born 1931), American legal academic
- Jack Montgomery (actor) (born 1992), British actor
- Jack C. Montgomery (1917–2002), Medal of Honor recipient
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