Onondaga County and had a population of 1,473 in 2000, on about 9 square miles. 6. Poospatuck Reservation (Poospatuck Nation) This reservation is located in Suffolk County and had a population of 271 in 2000, on about 55 acres. 7. St. Regis Mohawk Reservation [ Akwesasne ] ( Mohawk Nation ) This