Allegany -- U.S. County in New York Population (2000): 49927 Housing Units (2000): 24505 Land area (2000): 1030.219638 sq. miles (2668.256500 sq. km) Water area (2000): 4.200724 sq. miles (10.879826 sq. km) Total area (2000): 1034.420362 sq. miles (2679.136326 sq. km) Located within: New York (NY), FIPS 36 Location: 42.232936 N, 78.026092 W Headwords: Allegany Allegany, NY Allegany County Allegany County, NY