James Montague or Montagu may refer to:
James Montagu (MP) (died 1666), MP for Huntingdon James Montague (bishop) (1568–1618), English bishop James J. Montague (1873–1941), American writer and poet James Montagu (Royal Navy officer) (1752–1794), captain in the Royal Navy James Montagu (judge) (1666–1723), English barrister, and judge James Piotr Montague (born 1979), British writer and journalist