New York · FIPS 36075 · County seat: Oswego
Oswego County, NY GIS & Parcel Viewer
Oswego County, New York parcel data lives on NYS Tax Parcels Public layer (ArcGIS Map Viewer). Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Oswego County statewide map ↗
Opens arcgis.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | NYS Tax Parcels Public layer (ArcGIS Map Viewer) |
|---|---|
| Type | Statewide map (covers all of New York) |
| Website | arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Oswego |
| Population | 118,162 (2023 Census Bureau estimate) |
| Land area | 952 sq mi |
| FIPS code | 36075 |
Where the parcel data comes from
This is a statewide map, not a county site. NYS Tax Parcels Public layer (ArcGIS Map Viewer) covers parcels across New York, and Oswego County is one part of it. Because a state agency compiles this layer from local data, check with the Oswego County assessor or recorder before relying on a recent change. Our October 2026 check found the map open to the public, with no account or payment needed.
How to use the Oswego County viewer
- Open NYS Tax Parcels Public layer (ArcGIS Map Viewer) in a new tab and zoom to Oswego County (around Oswego).
- Type a street address into the search box, or click directly on a parcel.
- Review the parcel attributes; field names vary by state.
- Confirm anything important with the county assessor, since the statewide layer is a compiled copy.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
The county in brief
The U.S. Census Bureau estimated Oswego County's population at 118,162 in 2023, spread over about 952 square miles of land, or roughly 124 people per square mile. Among New York's 62 counties, it is the 24th largest by population. Census maps also count about 360 square miles of water inside its boundary. The county seat is Oswego.
Counties next to Oswego County
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Oswego County:
Maps vs. surveys
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.