County · New York

Seneca County

Seneca County is a county 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 (Iroquois), who occupied part of the region. The county is part of the Finger Lakes region of the state.

Governance bodies

County Legislature Primary
governing council

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Cities and towns 4

Townships 10

Reference data (Census of Governments 2022)

Census ID (PID6): 170436
FIPS state: 36
FIPS county: 099
FIPS place: 99099
Census record name: COUNTY OF SENECA
Mailing address: 1 DIPRONIO DR, WATERLOO 13165