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John Montgomery (Leominster MP), 14th-century MP for Leominster •
John Montgomerie (Ayrshire MP) (1680–1731), MP for Ayrshire 1710–27 •
John Montgomerie (died 1725), Scottish businessman and politician, MP for Linlithgowshire 1704–7, for Buteshire 1710 •
John Montgomery (Continental Congress) (1722–1808), U.S. merchant, continental congressman for Pennsylvania •
John Montgomery (Maryland politician) (1764–1828), U.S. lawyer, congressman from Maryland •
John Montgomery (Oklahoma politician), member of the Oklahoma Senate •
John Montgomery (shipbuilder) (1800–1867), Canadian shipbuilder, merchant and politician in New Brunswick •
John Flournoy Montgomery (1878–1954), U.S. ambassador to Hungary during World War II •
John Gallagher Montgomery (1805–1857), U.S. lawyer, congressman for Pennsylvania •
John M. Montgomery (1843–1895), Canadian politician from Prince Edward Island •
John Montgomery (died 1733), Irish M.P. for County Monaghan, Ireland •
John Montgomery (1747–1797), Irish soldier and M.P •
John Montgomery (died 1741) (1719–1741), M.P. for County Monaghan, Ireland ==Military==