New York · FIPS 36105 · County seat: Monticello
Sullivan County, NY GIS & Parcel Viewer
Looking for lot lines or a parcel number in Sullivan County, NY? The quickest route is Parcels for Sullivan County, the county parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the Sullivan County parcel map ↗
Opens gis2017-04-13t155717567z-sullconygiso.opendata.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Sullivan County at a glance
| Official map | Parcels for Sullivan County |
|---|---|
| Type | County-run map |
| Website | gis2017-04-13t155717567z-sullconygiso.opendata.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Monticello |
| Population | 79,920 (2023 Census Bureau estimate) |
| Land area | 968 sq mi |
| FIPS code | 36105 |
Where the parcel data comes from
It is a county-level map: Sullivan County or the company it hires keeps the parcel layer up to date. As of our October 2026 test, anyone could open it without signing in or paying.
Searching for a parcel, step by step
- Open the official link; the viewer runs on Esri's ArcGIS platform.
- Find the search control and type in a street address or parcel ID, or zoom in by hand.
- Click a parcel to see the attributes the publisher shares.
- Use any layer or basemap tools to add aerial imagery or other map 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.
The county in brief
Census Bureau figures put Sullivan County at about 79,920 people (2023 estimate) on roughly 968 square miles of land, which is about 83 residents per square mile. That makes it number 33 out of 62 New York counties by population. The county seat is Monticello.
Neighboring counties
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Sullivan County:
A note on accuracy
The lines you see online are approximate. They're good for finding a lot and its parcel number, but a legal boundary question needs the recorded plat or a surveyor.