New York · FIPS 36103 · County seat: Riverhead
Suffolk County, NY GIS & Parcel Viewer
Looking for lot lines or a parcel number in Suffolk County, NY? The quickest route is the Suffolk County parcel map, 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 Suffolk County parcel map ↗
Opens gisapps.suffolkcountyny.gov in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Suffolk County parcel map |
|---|---|
| Type | County-run map |
| Website | gisapps.suffolkcountyny.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Riverhead |
| Population | 1,523,170 (2023 Census Bureau estimate) |
| Land area | 911 sq mi |
| FIPS code | 36103 |
About the official source
Suffolk County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. 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 official link in a new tab.
- Accept any disclaimer, then look for a search box that takes street addresses, owners or parcel IDs.
- Zoom in and click a parcel to see its details.
- Use the map's layer controls to add aerials or other layers if they're offered.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
About Suffolk County
The U.S. Census Bureau estimated Suffolk County's population at 1,523,170 in 2023, spread over about 911 square miles of land, or roughly 1,672 people per square mile. That makes it number 4 out of 62 New York counties by population. Census maps also count about 1,462 square miles of water inside its boundary. Its county seat is Riverhead.
Nearby parcel maps
Suffolk County shares a border with the counties below. Each link has its own official map:
- Nassau County
- Fairfield County, CT
- Middlesex County, CT
- New Haven County, CT
- New London County, CT
- Washington County, RI
Related guides
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.