John Underhill (7 October 1597 – 21 July 1672) was an early English settler and soldier in the Massachusetts Bay Colony, the Province of New Hampshire, where he also served as governor; the New Haven Colony, New Netherland, and later the Province of New York, settling on Long Island. Hired to train militia in New England, he is most noted for leading colonial militia in the Pequot War (1636–1637) and Kieft's War which the colonists mounted against two different groups of Native Americans. He also published an account of the Pequot War.