New York · FIPS 36045 · County seat: Watertown
Jefferson County, NY GIS & Parcel Viewer
Parcel lookups for Jefferson County start at the Jefferson County Beacon site. This page gives you that official link, notes on how the viewer works, and links to the counties next door.
Open the Jefferson County parcel map ↗
Opens beacon.schneidercorp.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Jefferson County Beacon site |
|---|---|
| Type | County-run map |
| Website | beacon.schneidercorp.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Watertown |
| Population | 114,787 (2023 Census Bureau estimate) |
| Land area | 1,269 sq mi |
| FIPS code | 36045 |
About the official source
This map is published by or for Jefferson 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 to the Beacon site from Schneider Geospatial. If a terms or disclaimer window appears, agree to it to continue.
- Use the search bar to look up a street address, an owner's name or a parcel ID. Beacon sites usually also have a dedicated property search page.
- Click a lot on the map and then open its report for assessment and property details.
- Use the layer and basemap controls to add aerial photos or other layers the county publishes.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
Jefferson County by the numbers
Jefferson County had an estimated 114,787 residents in 2023, according to the Census Bureau. With about 1,269 square miles of land, that works out to roughly 90 people per square mile. Among New York's 62 counties, it is the 25th largest by population. Census maps also count about 589 square miles of water inside its boundary. The county seat is Watertown.
Nearby parcel maps
Parcels close to the edge of Jefferson County can fall in the next county over. Neighboring counties:
Before you rely on the lines
Online parcel lines are drawn for tax and planning use. They can be off by several feet, so use a recorded plat or a licensed surveyor for fences, setbacks or a sale.