Munsee (also known as Munsee Delaware, Delaware, Ontario Delaware) is an endangered language of the Eastern Algonquian subgroup of the Algonquian language family, itself a branch of the Algic language family. Munsee is one of the two Delaware languages. It is very closely related to the extinct Unami Delaware, but the two are sufficiently different that they are considered separate languages. Munsee was spoken aboriginally in the vicinity of the modern New York City area in the United States, including western Long Island, Manhattan Island, Staten Island, as well as adjacent areas on the mainland: southeastern New York State, the northern third of New Jersey, and northeastern Pennsylvania.