New Mexico · FIPS 35028 · County seat: Los Alamos
Los Alamos County, NM GIS & Parcel Viewer
Los Alamos County, New Mexico parcel data lives on NM Office of the State Engineer County Parcels 2025 layer (ArcGIS Map Viewer). Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Los Alamos County statewide map ↗
Opens arcgis.com in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | NM Office of the State Engineer County Parcels 2025 layer (ArcGIS Map Viewer) |
|---|---|
| Type | Statewide map (covers all of New Mexico) |
| Website | arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Los Alamos |
| Population | 19,444 (2023 Census Bureau estimate) |
| Land area | 109 sq mi |
| FIPS code | 35028 |
About the official source
This is a statewide map, not a county site. NM Office of the State Engineer County Parcels 2025 layer (ArcGIS Map Viewer) covers parcels across New Mexico, and Los Alamos County is one part of it. Statewide parcel layers are usually stitched together from county files, so the newest splits or sales may show up on the county's own records first. Our October 2026 check found the map open to the public, with no account or payment needed.
How to use the Los Alamos County viewer
- Open the statewide map with the button above.
- Search for an address in Los Alamos County, or zoom to the county on the map.
- Click a parcel to see the attributes the state layer includes.
- Write down the parcel number and use it for records searches with the Los Alamos County assessor or recorder.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
About Los Alamos County
The U.S. Census Bureau estimated Los Alamos County's population at 19,444 in 2023, spread over about 109 square miles of land, or roughly 178 people per square mile. By population it ranks 20th of 33 counties in New Mexico. The county seat is Los Alamos.
Neighboring counties
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Los Alamos County:
A note on accuracy
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.