Allegany Reservation (Uhì·yaʼ in Tuscarora) is a Seneca reservation in Cattaraugus County, New York, United States. In the 2000 census, 42 percent of the population within the Reservation boundaries were European Americans; they occupy properties under leases from the Seneca Nation of Indians, a federally recognized tribe. The population outside of the rented towns was 1,020 at the 2010 census.