Los Alamos County, New Mexico
Historic newspapers, landmarks, and county history layers for genealogists and local historians.
At a glance
SummaryThe National Register of Historic Places includes 14 listed properties in the county, first listed in 1966; 2 are also National Historic Landmarks. Most listings are in or near Los Alamos, Espanola, White Rock.
Summary generated automatically from the source data on this page.
Newspapers
Library of CongressNewspaper directory data for New Mexico is not yet loaded on this site. Browse Los Alamos titles at the Library of Congress.
National Register of Historic Places
NPS NRHP1 of 14 listings mapped; some locations are restricted by NPS to protect sensitive sites.
14 listed properties
| Property | City | Listed |
|---|---|---|
| Bandelier CCC Historic District NHL | Bandelier National Monument | 1987 |
| Bandelier National Monument Archeological and Historic District (Boundary Increase) | Los Alamos | 2014 |
| Bayo Road | Los Alamos | 2003 |
| Chupaderos Canyon Small Structural Site | Espanola | 1990 |
| Chupaderos Mesa Village | Espanola | 1990 |
| Grant Road | Los Alamos | 2004 |
| Guaja Water/Soil Control Site | Espanola | 1990 |
| Guaje Site | Los Alamos | 1982 |
| Los Alamos Scientific Laboratory NHL | Los Alamos | 1966 |
| Lujan Road | Los Alamos | 2005 |
| Pajarito Springs Site | White Rock | 1982 |
| United States Post Office-Los Alamos, New Mexico | Los Alamos | 2015 |
| White Rock Canyon | White Rock | 1990 |
| White Rock Canyon (Boundary Increase) | White Rock | 1992 |
Source: National Park Service, National Register of Historic Places. Property links open NRHP nomination files at the National Archives.
County formation
Newberry AHCBLos Alamos was formed in 1949 (1949-03-16) from Sandoval, Santa Fe.
LOS ALAMOS created from SANDOVAL and SANTA FE.
Source: Newberry Library, Atlas of Historical County Boundaries.
Population by decade
CensusLos Alamos County population from 1950 to 2020 (Census historical series).
| 1950 | 1960 | 1980 | 2000 | 2020 |
|---|---|---|---|---|
| 10,476 | 13,037 | 17,599 | 18,343 | 19,419 |
Sources: U.S. Census Bureau historical county population (Forstall 1790–1990) and public-domain / CC0 county population series through 2020.
National Park Service sites nearby
NPSPark units within about 40 km of the county centroid (from NPS Public POIs; no API key).
| Site | Type | Dist. |
|---|---|---|
| Bandelier National Monument | Park unit | 7.8 km |
| Valles Caldera National Preserve | Park unit | 19.6 km |
Source: NPS National Datasets / Public POIs. The NPS Developer API requires a free key and was not used.
Cemeteries & historical places
USGS GNIS1 cemeteries and 0 historical populated places (ghost towns / former settlements) recorded in USGS GNIS for this county.
Cemeteries — 1 of 1 listed
| Name |
|---|
| Guaje Pines Cemetery |
Source: USGS Geographic Names Information System (public domain). Cemeteries from the 2021 NationalFile archive; historical places from GNIS HistoricalFeatures topical extract.
Historical markers
HMdb linkMarker text and photos from the Historical Marker Database (HMdb) are not embedded here. HMdb allows non-commercial reuse with attribution, but commercial/compensated use needs written permission; this is a commercial site, so we only link out.
Search HMdb for Los Alamos County, New Mexico
Terms: hmdb.org/copyright.asp. Linking is encouraged by HMdb.