Blog · October 14, 2026 · New Mexico
The Union County Plat Map: a New Mexico guide
How to search and read the Union County map, with notes for land near Clayton.
Main page: Union County, NM GIS & Parcel Viewer (official map link, Union County facts and neighboring maps).
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A Union County plat map answers the basic land questions around Des Moines: who owns it, how big it is, where it sits. Below is the link, a quick tour of the parcel record, and the limits to keep in mind near Hayden.
How to use the Union County plat map
Click a parcel near Folsom to see the parcel number, owner, acreage and a short legal description. Depending on the viewer, a tract near Hayden may show land use codes and improvement values, which point you to the recorded documents.
Search Union County parcels by owner, address or ID
For Union County, the free public parcel layer is state-run: open the NM Office of the State Engineer County Parcels 2025 layer in ArcGIS Map Viewer and pan to Des Moines. Most people find their Union County tract fastest by searching an address in Des Moines, then clicking the outline. For a backup route to the map covering Des Moines, our Union County directory entry keeps the link current.
Getting more out of the Union County viewer
Switch the basemap to aerial over Grenville to check what's actually on the ground, and remember photos and lines can be offset. Layer lists in the Union County viewer may include zoning, flood or township layers, worth a look before your next call.
Common uses for the map
Builders around Des Moines rely on it to find owner names and mailing addresses, then ask the right office for documents. Keep a short list of Union County tracts with IDs and owners; they're the fastest way back to a record.
Field tips near Clayton
On a phone near Clayton, the viewer typically works in a browser, but GPS drift adds its own error. If the map near Folsom hangs, try again outside business hours, and it typically comes back quickly.
Work and land use in Union County
Union County's 2022 business count was 93 establishments, with retail trade, construction, and other services the largest groups. Accommodation (hotels, motels, RV parks and camps) make up an above-average share of Union County businesses, a clue to how land around Clayton gets used.
Towns and land across Union County
Town lots cluster around Clayton, the county seat, and Des Moines, Folsom, and Grenville. Smaller places such as Capulin, Amistad, and Gladstone appear on the Union County map as little clusters of lots. Union County had an estimated 3,964 people in 2023 (Census Bureau), spread across about 3,825 square miles. Outside Grenville, most of the county map is farm, ranch or timber ground with large, irregular tracts. Union County was organized in 1894, so deeds for older farms near Folsom can run back a long way.
Tracts that cross the Union County line
Union County borders Baca County, CO, Las Animas County, CO, Colfax County, Harding County, and Quay County, and each keeps its own parcel map and records. Every map bordering Union County is listed on our New Mexico directory.
Deeds and plats behind the Union County map
For land near Grenville, the deed itself lives in the county recording office, and the map is an index to it. A deed book and page or instrument number on the county record is the fastest way to pull the document for a lot in Grenville.
What the map can't settle
Parcel outlines near Folsom are built for assessment, and a licensed survey settles the real numbers. Ownership on the county map can lag recent sales, so a sale near Grenville last month may not show yet.
Quick answers for Union County
How do I find a property on the Union County map?
Search an address in Clayton, and click the outline.
Can I trust parcel lines near Clayton?
They're rough near Clayton; a recorded plat or survey decides the real boundary.
Is the Union County plat map free?
No account is needed for parcels near Clayton, although the recording office may charge for certified copies.
Why does the Union County map show the old owner?
The Union County roll lags the courthouse; a deed filed lately may not show yet.
Does the Union County map show acreage?
The record near Hayden shows a tax acreage figure, which can differ from a survey.
Where are deeds for Union County land kept?
Use the instrument number on the Union County record; the parcel record often lists the book and page.
Open the official Union County, NM parcel map Union 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.