Allegany County is a county in the Southern Tier of the U.S. state of New York. As of the 2020 census, the population was 46,456. Its county seat is Belmont. Its name derives from a Lenape word, applied by European-American settlers of Western New York State to a trail that followed the Allegheny River; they also named the county after this. The county is bisected by the Genesee River, flowing north to its mouth on Lake Ontario. During the mid-nineteenth century, the Genesee Valley Canal was built to link southern markets to the Great Lakes and Mohawk River. The county was also served by railroads, which soon superseded the canals in their capacity for carrying freight. Part of the Oil Springs Reservation, controlled by the Seneca Nation, is located in the county.

Founded: 1806
Named for: Lenape name for the Allegheny River
Seat: Belmont
Largest town: Wellsville
Total: 1,034 sq mi (2,678.05 km²)
Land: 1,029 sq mi (2,665.1 km²)
Water: 5.1 sq mi (13.21 km²), 0.5
Density: 45.1/sq mi (/km²)
Time zone: Eastern: UTC-5-4
Official Website: http://www.alleganyco.com
Wikidata description: county in New York, United States
Wikidata id: Q47944
Wikidata label: Allegany County
Wikidata aliases: Array
Source
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