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New Mexico Counties
New Mexico County map
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New Mexico Counties

There is thirty-three counties in the state of New Mexico. There were originally nine counties formed in 1852. Santa Ana County, New Mexico Territory, one of the nine original counties, was annexed in 1876 to Bernalillo County, New Mexico.

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Los Alamos County, New Mexico

Los Alamos County Education, Geography, and HistoryLos Alamos County, New Mexico Courthouse

Los Alamos County is a county in the state of New Mexico. Based on the 2010 census, the population was 17,950. The smallest county in area of this state was administered exclusively by the US federal government during the Manhattan Project, but now has equal status to New Mexico's other counties. The county seat is Los Alamos. The other population center in the county is White Rock.

Los Alamos County comprises the Los Alamos, NM Micropolitan Statistical Area, which is also included in the Albuquerque-Santa Fe-Las Vegas, NM Combined Statistical Area.

Etymology - Origin of Los Alamos County Name

Named for its principal town

Demographics:

County QuickFacts: Census Bureau Quick Facts

Los Alamos County History

Los Alamos County was created 16 March 1949. The county seat is Los Alamos. This is the smallest county in New Mexico. Small packages pack a big punch! The famous Manhattan Project was completed here. This county remains important in the nuclear and scientific area. Friendly people, clear skies and fresh air make this a popular county.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 109 square miles (280 km2), of which 109 square miles (280 km2) is land and 0.09 square miles (0.23 km2) (0.08%) is water.

It is the smallest county by area in New Mexico. There is no significant open water in the county. The county's highest point is located along its northern border, near the summit of Caballo Mountain, at 10,480 feet above sea level.

Neighboring Counties

Bordering counties are as follows:

  • Rio Arriba County - northeast
  • Santa Fe County - east
  • Sandoval County - south, west, north (and the Sandoval exclave to the east)

Education

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