Charles Montagu may refer to:
- Charles Montagu (of Boughton) (1564–1625), English MP for Higham Ferrers
- Charles Montagu, 1st Earl of Halifax (1661–1715), English poet and statesman
- Charles Montagu, 1st Duke of Manchester (c.1656–1722)
- Hon. Charles Montagu (died 1721) (c.1658–1721), Member of Parliament for Durham
- Charles Montagu (of Papplewick) (died 1759), Member of Parliament for Westminster, St. Germans, Camelford, Northampton and St. Albans
- Sir Charles Montagu (British Army officer) (died 1777), British general
- Lord Charles Montagu (1741–1784), Royal Governor of the Province of South Carolina
- Charles Montagu, 5th Baron Swaythling (born 1954)