Seneca County is located in the U.S. state of New York. As of the 2020 census, the population was 33,814. The primary county seat is Waterloo, moved there from the original county seat of Ovid in 1819. It became a two-shire county in 1822, which currently remains in effect and uses both locations as county seats although the majority of Seneca County administrative offices are located in Waterloo. Therefore, most political sources list only Waterloo as the county seat. The county's name comes from the Seneca Nation of the Haudenosaunee, who occupied part of the region. The county is part of the Finger Lakes region of the state. Seneca County comprises the Seneca Falls, NY Micropolitan Statistical Area, which is also included in the Rochester-Batavia-Seneca Falls, NY Combined Statistical Area.

Founded: 1804
Named for: Seneca people
Seat: Waterloo and Ovid
Largest CDP: Seneca Falls
Total: 390 sq mi (1,010.1 km²)
Land: 324 sq mi (839.16 km²)
Water: 67 sq mi (173.53 km²), 17
Density: 104.5/sq mi (/km²)
Time zone: Eastern: UTC-5-4
Website: [www.co.seneca.ny.us]
Official Website: http://www.co.seneca.ny.us
Wikidata description: county in New York, United States
Wikidata id: Q71136
Wikidata label: Seneca County
Wikidata aliases: Array
Source
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