Blog · October 13, 2026 · New Hampshire
Merrimack County, New Hampshire: GIS Map Guide
The free official GIS map for Merrimack County, how to search it, and what the parcel data does and doesn't tell you about owners, acreage and property lines.
Main page: Merrimack County, NH GIS & Parcel Viewer (official map link, Merrimack County facts and neighboring maps).
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Parcel lines, owner names and acreage for every tract from Concord to Bradford are a few clicks away on the Merrimack County GIS map, and it costs nothing to use.
Next: the Merrimack County viewer link, a quick look at Concord and the surrounding land, and how New Hampshire records back up the map.
Where to open the official Merrimack County GIS map
Open the statewide NHDOT Parcel Mosaic Viewer and zoom toward Bradford; Merrimack County's parcels are part of that layer. A one-time disclaimer stands between you and the Merrimack County parcels; accept it to continue. Try the search box with a Bradford street address first; for open land near Loudon, it's faster to pan and click. Our Merrimack County listing carries the same link plus neighboring maps.
Behind the map: land records in Merrimack County
For land near Andover, the parcel record is the index; the recorded deed is the source. Names differ across states, so confirm on the official Merrimack County site which office records deeds and plats. If you need a plat for a lot in Bradford, look for the plat book and page or the subdivision name in the parcel record, then request that document from the recording office.
Towns, terrain and land across Merrimack County
The county seat is Concord; Franklin, Allenstown, Andover, and Boscawen are among the other communities you can zoom to. Out in the countryside, Blodgett Landing, Contoocook, and Henniker appear as small knots of lots along the road network. By Census Bureau figures, the county had roughly 157,103 residents in 2023, spread over about 933 square miles of land. The mix of town lots in Concord and rural acreage beyond makes the Merrimack County parcel map useful for house hunters and land buyers alike. Public land in or near the county, including John Hay National Wildlife Refuge, changes how nearby private land sells.
Who's clicking on Merrimack County parcels
Here's who tends to use it in Merrimack County. Relocating buyers who can't visit Bradford in person use the map and aerial layer to size up a lot from a distance. Builders bidding a house on a lot in Bradford start with the parcel ID and legal description, since permit paperwork usually asks for both. First-time land buyers near Loudon use the map to find unbuilt tracts and contact owners directly.
Acreage and vacant lot search
How to work the Merrimack County GIS map for open land:
- Turn on the photo basemap and work outward from Bow one road at a time, flagging parcels with no buildings.
- Open the record for each empty tract near Bow and note whether the owner's mailing address is outside Merrimack County.
- Pull up three or four similar parcels near Andover and compare their land values.
- Measure the road frontage on the map; a sliver of frontage on a road outside Andover may not be enough for a driveway permit.
- Rural lots near Loudon may need a septic permit and a well, so ask before you commit.
For a tract near Andover with no road frontage, see how to tell if land is landlocked.
What the Merrimack County GIS map shows about lot lines
Parcel boundaries on the Merrimack County viewer are drawn to keep tax accounts straight, so small offsets from the true line are expected. In Merrimack County, a rural deed may describe a line running to a creek, a stone or a neighbor's corner, which is why the map lines wander. For a fence, an addition or a dispute in Merrimack County, budget for a licensed survey; it's the answer a court or a lender will accept.
A note on timing and acreage
Splits and sales near Loudon can take weeks or months to show up on the parcel layer. Treat Merrimack County acreage figures as estimates until a survey confirms them.
Merrimack County parcel map FAQ
Can I check flood zones on the Merrimack County map?
Zoning for land near Bow comes from the local planning office; flood zones are on FEMA's map service if the viewer lacks them.
How do I find property lines in Merrimack County?
Pull up the tract on the Merrimack County map, copy its legal description, and compare it with the deed. Exact corners take a surveyor.
Where is the Merrimack County courthouse?
Concord is the county seat.
Does Merrimack County charge for its property map?
Yes, viewing parcels around Concord is free and needs no account; only copies of recorded documents cost money.
Can I find the owner of a vacant lot in Merrimack County?
Every parcel in the Merrimack County viewer shows an owner of record. Rural tracts near Loudon can be found by panning and clicking.
Open the official Merrimack County, NH parcel map Merrimack 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.