The Niantic, or in their own language, the Nehântick or Nehantucket, were a tribe of Algonquin-speaking Native Americans, who were living in Connecticut and Rhode Island during the early colonial period. Due to intrusions of the Pequot, the Niantic were divided into an eastern and western division. The Western Niantic were subject to the Pequot and lived just east of the mouth of the Connecticut River while the Eastern Niantic became very close allies to the Narragansett.
The division of the Niantic became so great that the language of the eastern Niantic is classified as a dialect of Narragansett while the language of the western Niantic is classified as Pequot-Mohegan.
The Niantic were an Algonquian speaking people, speaking an Algonquian Y-dialect, similar to their neighbours the Pequot, Montauk, Mohegan, and Narragansett. The tribe's name "Nehantic" (Nehântick) means "of long-necked waters" believed by local residents to refer to the "long neck" or peninsula of land now known as Black Point; located in the village of Niantic, Connecticut. The Nehântics spent their summers fishing and digging the shellfish which were once abundant there and for which the area is famous (see Millstone Nuclear Power Plant). They lived on corn, beans, and squash, supplemented by hunting, fishing, and collecting.
Conflict broke out between the Niantic and their colonial neighbors, leading to punitive military expeditions that dealt out massive destruction in contrast to the rather limited incidents that had provoked the conflict. As the violence became more widespread it evolved into the Pequot War in 1637. This conflict resulted in almost total destruction of the Western Niantic, whose roughly 100 remaining members merged into the Mohegans and Pequots. There are members of these tribes who can trace their ancestry back to Nehântick members, especially in the vicinity of Lyme, Connecticut. Some of the Niantic who joined the Mohegan and Pequot fled west and joined the Brotherton Indians to escape further English harassment.