Los Alamos County
Parcel & Property Data
About This Data
LandBrief holds 8,551 parcel records for Los Alamos County, sourced from county records. Each includes the parcel boundary, and — where the county publishes them — owner, situs address, acreage, assessed values and legal description.
Data from the Los Alamos County assessor roll dated November 2022, loaded August 2026. See data sources for every county’s vintage.
Explore Los Alamos County
Los Alamos County by the Numbers
- Median parcel size
- 0.23 acres
measured from mapped boundaries - 90th-percentile parcel
- 0.65 acres
- County land area
- 69,839 acres
U.S. Census measurement - Communities
- 3
3.0% of parcels outside any incorporated place
Who Owns Los Alamos County?
Share of the county’s 8,551 parcels by the kind of owner on record. Classified from owner names, so the boundaries are approximate; an entity the rules cannot place counts as an individual.
| Owner type | Share of parcels |
|---|---|
| Individuals | 70.4% |
| Companies & organizations | 6.8% |
| Trusts & estates | 18.7% |
| Government | 3.3% |
| Other / unclassified | 0.7% |
The largest owner on record is LOS ALAMOS COUNTY with 274 parcels — see the full landowner leaderboard.
Parcel Records (~8,551 total)
| Parcel ID | Owner | Address | City | Acreage |
|---|---|---|---|---|
| 1035109152214 | LOS ALAMOS NATIONAL LABORATORY | 4200 W JEMEZ RD | Unincorporated | 23331.26 † |
| 1031108180331 | BANDELIER NATIONAL MONUMENT | 15 ENTRANCE RD | Unincorporated | 6665.32 † |
| 1039106195387 | LOS ALAMOS COUNTY | 9999 ESTANTE | White Rock | 0.92 † |
| 1039106129373 | DALY PAUL C & LINDA F REVOC TRUST | 428 ESTANTE WAY | White Rock | 2.52 † |
| 1039106205374 | HANSEL KENNETH & DENISE | 414 ESTANTE WAY | White Rock | 3.31 † |
| 1039106271364 | HILL M ISABEL | 411 ESTANTE WAY | White Rock | 3.39 † |
| 1039106177358 | MARTIN MICHAEL J & DONAHUE CARLY M | 416 ESTANTE WAY | White Rock | 3.07 † |
| 1039106088363 | GILLESPIE CM & KB REVOC TR | 427 ESTANTE WAY | White Rock | 2.98 † |
| 1039106247345 | HAMPEL TERESA A | 413 ESTANTE WAY | White Rock | 2.61 † |
| 1039106148344 | COLGATE ARTHUR S | 422 ESTANTE WAY | White Rock | 2.64 † |
Download Los Alamos County parcel data
All 8,551 parcels in Los Alamos County as a single file — free, no account needed. Shapefile, GeoJSON, GeoPackage, CSV and Parquet.
Get Los Alamos County on FreeParcelData →Nearby counties
Frequently Asked Questions
How many parcels are in Los Alamos County?
The Los Alamos County assessor roll on file records 8,551 parcels across 3 communities, with 3.0% lying outside any incorporated place.
Who owns the most land in Los Alamos County?
LOS ALAMOS COUNTY holds 274 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.
What is the typical parcel size in Los Alamos County?
Measured from mapped boundaries, the median parcel is 0.23 acres, and nine parcels in ten are under 0.65 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.
How much of Los Alamos County is government-owned?
Government entities — federal, state, and local — hold 3.3% of the county’s parcels, classified from owner names on the roll.
How current is this data?
It comes from the Los Alamos County assessor roll dated November 2022. Counties deliver on their own schedules; the methodology page explains how records are processed and the data sources page tracks every county’s vintage.
Browse by City (3)
8,551 parcels across 3 communities in Los Alamos County.