Massapequa (, mass-ə-PEEK-wə) is a hamlet and census-designated place (CDP) in the southern part of the Town of Oyster Bay in southeastern Nassau County, New York, on Long Island, east of New York City. It is adjacent to Amityville in Suffolk County. As of the 2010 census, the CDP had a total population of 21,685. Greater Massapequa, including North Massapequa, East Massapequa, and Massapequa Park, has a population of over 75,000. It is serviced by the Massapequa Station on the Long Island Rail Road.
The Massapequa were identified as one of the "13 tribes of Long Island," but additional research has shown that they were a band of Lenape, the Algonquian-speaking people who occupied the western part of the island at the time of European encounter. The bands were identified by names of the geographic areas they occupied.
The people to the east spoke a different Algonquian language and were related to the Pequot people of Connecticut and southern New England, another in the large Algonquian languages family of tribes in coastal areas along the Atlantic Ocean. Major bands of Pequot in eastern Long Island were the Montaukett and Shinnecock. Today the Shinnecock Indian Nation has gained federal recognition and has a reservation on the South Shore of Long Island.