New Hampshire · FIPS 33007 · County seat: Lancaster
Coos County, NH GIS & Parcel Viewer
Use this page to reach the official statewide parcel map for Coos County, New Hampshire. The button below opens NHDOT Parcel Mosaic Viewer in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Coos County statewide map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Coos County at a glance
| Official map | NHDOT Parcel Mosaic Viewer |
|---|---|
| Type | Statewide map (covers all of New Hampshire) |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Lancaster |
| Population | 31,372 (2023 Census Bureau estimate) |
| Land area | 1,795 sq mi |
| FIPS code | 33007 |
Where the parcel data comes from
Coos County doesn't have its own viewer in our directory, so we point you to a statewide map: NHDOT Parcel Mosaic Viewer. Zoom in on Coos County to see its parcels. A statewide layer can trail the county's own books by weeks or months, so treat it as a fast first look rather than the final word. Our October 2026 check found the map open to the public, with no account or payment needed.
How to use the Coos County viewer
- Press the button to load the statewide viewer, then move the map to Coos County.
- Use the viewer's search tool to find an address or parcel, if it has one.
- Click a lot to read its details.
- For deeds, taxes or official copies, take the parcel number to the county's own offices.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
About Coos County
The U.S. Census Bureau estimated Coos County's population at 31,372 in 2023, spread over about 1,795 square miles of land, or roughly 17 people per square mile. That makes it the least populous of New Hampshire's 10 counties. The county seat is Lancaster.
Counties next to Coos County
Coos 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.