Massachusetts · FIPS 25019 · County seat: Nantucket
Nantucket County, MA GIS & Parcel Viewer
Parcel lookups for Nantucket County start at MassGIS Interactive Property Map. This page gives you that official link, notes on how the viewer works, and links to the counties next door.
Open the Nantucket County statewide map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Nantucket County at a glance
| Official map | MassGIS Interactive Property Map |
|---|---|
| Type | Statewide map (covers all of Massachusetts) |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Nantucket |
| Population | 14,444 (2023 Census Bureau estimate) |
| Land area | 46 sq mi |
| FIPS code | 25019 |
About the official source
The link goes to a statewide map (MassGIS Interactive Property Map). It shows parcels for Nantucket County along with the rest of Massachusetts. Because a state agency compiles this layer from local data, check with the Nantucket County assessor or recorder before relying on a recent change. As of our October 2026 test, anyone could open it without signing in or paying.
How to use the Nantucket County viewer
- Open MassGIS Interactive Property Map in a new tab and zoom to Nantucket County (around Nantucket).
- 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.
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.
Nantucket County by the numbers
The U.S. Census Bureau estimated Nantucket County's population at 14,444 in 2023, spread over about 46 square miles of land, or roughly 314 people per square mile. That makes it the least populous of Massachusetts's 14 counties. Another 257 square miles of water fall within its lines, according to Census mapping. The county seat is Nantucket.
Counties next to Nantucket County
Nantucket County shares a border with the counties below. Each link has its own official map:
Before you rely on the lines
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.