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Between Two Lakes With National History

Seneca County, New York

Seneca County occupies a Finger Lakes landscape between Seneca and Cayuga lakes, with Waterloo and Ovid sharing county-seat status. Women’s Rights National Historical Park adds national significance, while portions of Finger Lakes National Forest and Montezuma National Wildlife Refuge offer contrasting natural settings across the county. The U.S. Census Bureau estimated 32,883 residents in Seneca County, New York, on July 1, 2025.

Seneca County at a Glance

Population32,883 (July 1, 2025 Census estimate)
County SeatWaterloo and Ovid
StateNew York
Established1804
ZIP CodesVary by address
Total Area, Including Water390.424 square miles, including water (2020 Census geography)
Major RoutesInterstate 90; U.S. Route 20; State Route 5; State Route 89; State Route 96; State Route 96A
Area CodesSee local phone listings
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Discover Seneca County

Seneca County

Seneca County was established in 1804 in a region associated with both Seneca and Cayuga peoples of the Haudenosaunee. Ovid was the original county seat before government moved to Waterloo in 1819. A two-shire arrangement adopted in 1822 retained both places as county seats. This unusual civic structure remains important when reading local history. The county’s later national significance also includes the women’s-rights story preserved through Women’s Rights National Historical Park.

The county’s position between Seneca and Cayuga lakes creates a clear geographic framework for a visit. Waterloo, Ovid, and Seneca Falls provide different community reference points. Portions of Finger Lakes National Forest and Montezuma National Wildlife Refuge add natural landscapes alongside the women’s-rights historical sites. Planning by community and lake corridor helps connect these places while respecting the distances between the county’s northern and southern areas.

What Shapes Us

Local Character

Women’s Rights National Historical Park adds national significance, while portions of Finger Lakes National Forest and Montezuma National Wildlife Refuge offer contrasting natural settings across the county.

Community History

Seneca County was established in 1804 in a region associated with both Seneca and Cayuga peoples of the Haudenosaunee. Ovid was the original county seat before government moved to Waterloo in 1819.

Around the County

The county’s position between Seneca and Cayuga lakes creates a clear geographic framework for a visit. Waterloo, Ovid, and Seneca Falls provide different community reference points.

Two lakes frame many chapters of community history.
New York State Department of Transportation

New York & Atlantic Railway Receives $6.5 Million Federal CRISI Grant, Joining State and Private Funding in a $10.9 Million Partnership to Upgrade Four Locomotives with Cleaner Technology

Read the Story Oct 28, 2026 • 2 min read
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County Resources

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County photographs from Wikimedia Commons; images may be cropped for display.

Get to Know Seneca County

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Local Questions

Seneca County Questions, Answered

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32,883 (July 1, 2025 Census estimate). This is a dated Census Bureau estimate, rather than a live resident count.

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