New York · FIPS 36099 · County seat: Waterloo
Seneca County, NY GIS & Parcel Viewer
Seneca County, New York parcel data lives on the Seneca County ArcGIS parcel map. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Seneca County parcel map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Seneca County ArcGIS parcel map |
|---|---|
| Type | County-run map |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Waterloo |
| Population | 32,349 (2023 Census Bureau estimate) |
| Land area | 324 sq mi |
| FIPS code | 36099 |
About the official source
This map is published by or for Seneca County itself, so it reflects the local parcel layer rather than a third-party copy. Our October 2026 check found the map open to the public, with no account or payment needed.
Searching for a parcel, step by step
- Open the link. This viewer is an ArcGIS Experience Builder app, so its layout is custom to the publisher.
- Look for a search box or search widget and type in a street address or parcel ID.
- Click a parcel to see its details in a pop-up or side panel.
- Check the toolbar for a layer list or basemap switcher if you want aerials or other layers.
If an address search comes up empty, try the parcel number from a tax bill or deed instead, or click the lot on the map.
Seneca County by the numbers
The U.S. Census Bureau estimated Seneca County's population at 32,349 in 2023, spread over about 324 square miles of land, or roughly 100 people per square mile. By population it ranks 57th of 62 counties in New York. Another 67 square miles of water fall within its lines, according to Census mapping. Its county seat is Waterloo.
Counties next to Seneca County
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Seneca County:
Before you rely on the lines
Keep in mind that a GIS parcel layer is a tax map, not a survey. For exact boundaries, look at the recorded deed and plat or hire a licensed land surveyor.