The Pequot (/ˈpiːkwɒt/ PEE-kwot) are a Native American people of Connecticut. The modern Pequot are members of the federally recognized Mashantucket Pequot Tribe, four other state-recognized groups in Connecticut including the Eastern Pequot Tribal Nation, or the Brothertown Indians of Wisconsin. They historically spoke Pequot, a dialect of the Mohegan-Pequot language, which became extinct by the early 20th century. Some tribal members are undertaking revival efforts.

The Pequot and the Mohegan were formerly a single group, but the Mohegan split off in the 17th century as the Pequot came to control much of Connecticut. Simmering tensions with the New England Colonies led to the Pequot War of 1634–1638, which some historians consider to be a genocide under modern day terms, which dramatically reduced the population and influence of the Pequot; many members were killed, enslaved, or dispersed. Small numbers of Pequots remain in Connecticut, receiving reservations at Mashantucket in 1666 and at the Pawcatuck River in 1683; others lived in different areas and with other tribes. In the 18th century, some Christian Pequot joined members of several other groups to form the Brothertown Indians in western New Hampshire. They relocated to Western New York in the 19th century, where they were allowed land by the Oneida people of the Iroquois League, and later to Wisconsin, where they were granted a reservation.

The Mashantucket Pequot Tribe received federal recognition in 1983 through a settlement of a land claim. In 1986, they founded the Foxwoods Resort Casino on their land. Located in proximity to the New York City metropolitan area, it has become one of the country's most successful Native American casinos.

The Pawcatuck River Pequot formed the Eastern Pequot Tribal Nation, which is recognized by Connecticut but is not federally recognized. Additionally, Pequot descendants are enrolled in the federally recognized Mohegan Tribe, as well as the Schaghticoke Tribal Nation and Golden Hill Paugussett Indian Nation of Connecticut, and the Brothertown Indians of Wisconsin, which also have degrees of state recognition. The Poospatuck Reservation on Long Island is home to a few hundred self-identified Pequot descendants.

Pequot is an Algonquian word whose meaning is disputed among language specialists. Considerable scholarship on the Pequot claims that the name came from Pequttôog, meaning "the destroyers" or "the men of the swamp". Frank Speck was a leading specialist of the Mohegan-Pequot language in the early twentieth century, and he believed that another term was more plausible, meaning "the shallowness of a body of water", given that the Pequot territory was along the coast of Long Island Sound.

Historians have debated whether the Pequot migrated about 1500 from the upper Hudson River Valley toward central and eastern Connecticut. The theory of Pequot migration to the Connecticut River Valley can be traced to Rev. William Hubbard, who claimed in 1677 that the Pequot had invaded the region sometime before the establishment of Plymouth Colony, rather than originating in the region. In the aftermath of King Philip's War, Hubbard detailed in his Narrative of the Troubles with the Indians in New-England the ferocity with which some of New England's tribes responded to the English. Hubbard described the Pequot as "foreigners" to the region; not invaders from another shore, but "from the interior of the continent" who "by force seized upon one of the goodliest places near the sea, and became a Terror to all their Neighbors."

Much of the archaeological, linguistic, and documentary evidence now available demonstrates that the Pequot were not invaders to the Connecticut River Valley but were indigenous in that area for thousands of years. By the time of the founding of Plymouth and Massachusetts Bay colonies, the Pequot had already attained a position of political, military, and economic dominance in central and eastern Connecticut. They occupied the coastal area between the Niantic tribe of the Niantic River of Connecticut and the Narragansett in western Rhode Island. The Pequot numbered some 16,000 persons in the most densely inhabited portion of southern New England.

The smallpox epidemic of 1616–1619 killed many of the Native Americans of the eastern coast of New England, but it did not reach the Pequot, Niantic, and Narragansett tribes. In 1633, the Dutch established a trading post called the House of Good Hope at Hartford. They executed the principal Pequot sachem Tatobem because of a violation of an agreement. After the Pequot paid the Dutch a large ransom, they returned Tatobem's body to his people. His successor was Sassacus.