Allegany Reservation (Uhì•yaˀ in Tuscarora) is an American Indian reservation in Cattaraugus County, New York, United States. The population was 1,099 at the 2000 census. The reservation is primarily occupied by members of the Seneca of the Iroquois, but a smaller number of Cayuga, another Iroquois tribe, also reside there.
According to the United States Census Bureau, the Indian reservation has a total area of 113.1 km² (43.7 mi²). 94.2 km² (36.4 mi²) of it is land and 18.8 km² (7.3 mi²) of it (16.65%) is water.
The reservation borders both banks of the Allegheny River and is within several of the towns in the south part of the county (South Valley, Cold Spring, Salamanca, Great Valley, Red House, Carrollton, and Allegany). The City of Salamanca, with the exception of a northern spur along U.S. Route 219, is also within the reservation.
The governmental headquarters for the Allegany Reservation are located in a small community known as Jimerson Town, an unincorporated h (from [www.wikipedia.org](http://www.wikipedia.org/wiki/Allegany_Reservation).