Pequot (pē´kwŏt), Native North Americans whose language belongs to the Algonquian branch of the Algonquian-Wakashan linguistic stock (see Native American languages). The Pequot are of the Eastern Woodlands cultural area (see under Natives, North American). Originally they were united with the Mohegan, but when Uncas revolted, the Pequot moved southward to invade and drive off the Niantic. The warlike Pequot, under their chief, Sassacus, had by 1630 extended their territory west to the Connecticut River. Numerous quarrels between settlers in the Connecticut valley and the Pequot led to the Pequot War (1637). The precipitating cause was the Pequot's murder of John Oldham, an English trader. The English under John Mason and John Underhill attacked their stronghold on the Pequot River and killed some 500 Pequot.
The remaining Pequot fled in small groups. One party went to Long Island, and a second escaped into the interior. A third, led by Sassacus, was intercepted near Fairfield, Conn., where almost the entire party was killed or captured. The captives were forced into slavery, mainly in New England and the West Indies. A few Pequot, including Sassacus, who managed to escape were put to death by the Mohawk. A remnant of the Pequot was scattered among the southern New England tribes; the colonial government later settled them in Connecticut. Today they live on two reservations in SE Connecticut. At Ledyard the Mashantucket Pequot established (1992) a casino, which has proved to be one of the largest and most profitable gambling establishments in the world; they also sponsor an elaborate tribal museum. In 1990 there were 679 Pequot in the United States.
See J. W. De Forest, History of the Indians of Connecticut (1851, repr. 1988); K. I. Eisler, Revenge of the Pequots: How a Small Native American Tribe Created the World's Most Profitable Casino (2001).