New York · FIPS 36059 · County seat: Mineola
Nassau County, NY GIS & Parcel Viewer
Parcel lookups for Nassau County start at Nassau County LRV Viewer. This page gives you that official link, notes on how the viewer works, and links to the counties next door.
Open the Nassau County parcel map ↗
Opens lrv.nassaucountyny.gov in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Nassau County LRV Viewer |
|---|---|
| Type | County-run map |
| Website | lrv.nassaucountyny.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Mineola |
| Population | 1,381,715 (2023 Census Bureau estimate) |
| Land area | 285 sq mi |
| FIPS code | 36059 |
About the official source
Nassau County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. When we tested the link in October 2026 it opened with no login and no fee.
Searching for a parcel, step by step
- Press the button above to open the county's own web map.
- Search for the property or pan and zoom to it.
- Click the lot to bring up what the county publishes about it.
- Look for print or measure tools if you need a quick map or rough size.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
About Nassau County
Census Bureau figures put Nassau County at about 1,381,715 people (2023 estimate) on roughly 285 square miles of land, which is about 4,848 residents per square mile. By population it ranks 5th of 62 counties in New York. Census maps also count about 169 square miles of water inside its boundary. Mineola serves as the county seat.
Counties next to Nassau County
Nassau County shares a border with the counties below. Each link has its own official map:
Before you rely on the lines
Treat the map as a guide, not a boundary survey: parcel outlines are often shifted a bit from the real corners. A licensed surveyor settles exact lines.