Blog · October 13, 2026 · New Hampshire
Coos County GIS Map: Parcels, Owners and Property Lines
Open the official Coos County parcel viewer, find an owner or a vacant tract, and learn which land records back up what the map shows.
Main page: Coos County, NH GIS & Parcel Viewer (official map link, Coos County facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Searching for a Coos County GIS map usually means you have a specific piece of ground in mind: a listing near Colebrook, a woodlot you drive past, or the lot next door.
The sections below cover the map itself, the towns from Colebrook to Groveton, and the deeds and surveys that settle what the map can't.
Where to open the official Coos County GIS map
The county relies on a state-hosted layer for public parcel viewing: NHDOT Parcel Mosaic Viewer. It covers Coos County along with the rest of New Hampshire. A one-time disclaimer stands between you and the Coos County parcels; accept it to continue. Try the search box with a Carroll street address first; for open land near Groveton, it's faster to pan and click. The same link lives on our Coos County county page, along with links for the surrounding area.
Who uses the Coos County parcel map
Different people come to the Coos County parcel map for different reasons. Bowhunters and waterfowlers around Colebrook use the parcel layer to see which owners control a creek bottom, a woodlot or a field edge. Land shoppers looking between Colebrook and Columbia measure road frontage on the map and check whether a tract is landlocked. If a listing in Carroll says the yard backs up to open land, the map shows who owns that land. Owners in Colebrook compare their assessment with similar lots on the same street.
The lay of the land in Coos County
Parcel searches in Coos County tend to center on Lancaster, the county seat, plus Berlin, Carroll, Clarksville, and Colebrook. Unincorporated spots like Gorham, Groveton, and West Stewartstown are worth a look if you want rural acreage near a crossroads community. The county was organized in 1803 and named for Algonquian for "small pines", so some tracts carry a long chain of deeds. Census Bureau estimates show 31,372 residents in 2023 and around 1,795 square miles of land in the county. The parcel pattern around Groveton is typical for the county: farm ground, wooded tracts and a handful of homesites carved off the road frontage. Public land in or near the county, including White Mountain National Forest and Umbagog National Wildlife Refuge, changes how nearby private land sells.
The Coos County economy in brief
The Census Bureau's County Business Patterns counted 822 business establishments in Coos County in 2022, and the largest groups were retail trade, accommodation and food services, and health care and social assistance. What stands out is forestry and logging, accommodation (hotels, motels, RV parks and camps), and utilities: those sectors make up a much larger slice of local businesses than they do nationally. If you're looking at wooded acreage near Columbia, compare recent aerials; logging can change a tract quickly.
Private and public hunting ground in Coos County
Hunters working the country toward the Essex County, VT line can use the parcel map to put a name on every woodlot and field. Around White Mountain National Forest and Umbagog National Wildlife Refuge, private tracts can press right up against the public boundary, so check the lines before you walk in. Season dates and license rules come from the state wildlife agency. Ask owners near Dalton early, ask politely, and send a thank-you after the season.
What the Coos County GIS map shows about lot lines
Zoom in far enough on a lot in Colebrook and you may notice lines crossing driveways or splitting sheds, a normal quirk of tax mapping. Land in New Hampshire is mostly described by metes and bounds: bearings, distances and calls to monuments or neighbors. That's why rural parcels in Coos County rarely look square. Planning a fence or shed on a lot in Colebrook? Have a New Hampshire licensed surveyor mark the corners first.
Behind the map: land records in Coos County
Every line on the Coos County map traces back to a recorded deed or plat, and the county's recording office keeps those documents. The office title varies by state (register of deeds, recorder, county clerk or clerk of court), so check the Coos County government website for the right one. Easements and rights-of-way are usually in recorded documents, not on the parcel map, so read the deed itself for a tract near Groveton.
Neighboring counties
If your land is near the edge, check the next county over too: Oxford County, ME, Carroll County, Grafton County, and Essex County, VT border Coos County. All of them are listed on our New Hampshire page.
Coos County parcel map FAQ
Where do property lines run on a Coos County, NH lot?
Find the tract near Colebrook on the parcel map, note the legal description, and compare it with the recorded deed. If you need certainty, a New Hampshire licensed surveyor can stake the corners.
Can I trust the acreage on the Coos County map?
For older rural tracts near Groveton, the GIS acreage can be off; get a survey if acreage drives the price.
Can I find the owner of a vacant lot in Coos County?
Search by address if the lot near Colebrook has one; otherwise click the tract on the map to see the owner of record.
What is the county seat of Coos County, New Hampshire?
The county seat is Lancaster.
Does the Coos County parcel map show where I can hunt?
Use it to find the owner of a woodlot near Columbia, then ask; the map itself grants no hunting rights.
Open the official Coos County, NH parcel map Coos County in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.