Los Alamos County, New Mexico

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Los Alamos County, New Mexico
Ashley Pond.jpg
Ashley Pond in Los Alamos
Seal of Los Alamos County, New Mexico
Map of New Mexico highlighting Los Alamos County
Location in the U.S. state of New Mexico
Map of the United States highlighting New Mexico
New Mexico's location in the U.S.
Founded 1949
Seat Los Alamos
Largest community Los Alamos
 • Land 109 sq mi (282 km2)
 • Water 0.09 sq mi (0 km2), 0.08%
 • (2010) 17,950
 • Density 164/sq mi (63/km²)
Congressional district 3rd
Time zone Mountain: UTC-7/-6
Website www.losalamosnm.us

Los Alamos County (Spanish: The Aspens) is a county in the U.S. state of New Mexico. As of the 2010 census, the population was 17,950.[1] The smallest county in area of this state was administered exclusively by the U.S. federal government during the Manhattan Project, but now has equal status to New Mexico's other counties. The county seat is Los Alamos.[2] 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.

The county is home to the Los Alamos National Laboratory.

Los Alamos County is noted for having the lowest level of child poverty of any county in the United States.[3]


According to the U.S. 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.[4] 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.

Adjacent counties

Pueblos with adjacent territories

National protected areas


Historical population
Census Pop.
1950 10,476
1960 13,037 24.4%
1970 15,198 16.6%
1980 17,599 15.8%
1990 18,115 2.9%
2000 18,343 1.3%
2010 17,950 −2.1%
Est. 2014 17,682 [5] −1.5%
U.S. Decennial Census[6]
1790-1960[7] 1900-1990[8]
1990-2000[9] 2010-2013[1]


Whereas according to the 2010 U.S. Census Bureau:


As of the census[10] of 2000, there were 18,343 people, 7,497 households, and 5,337 families residing in the county. The population density was 168 people per square mile (65/km²). There were 7,937 housing units at an average density of 73 per square mile (28/km²). The racial makeup of the county was 90.26% White, 0.37% Black or African American, 0.58% Native American, 3.78% Asian, 0.03% Pacific Islander, 2.70% from other races, and 2.28% from two or more races. 11.75% of the population were Hispanic or Latino of any race.

There were 7,497 households out of which 33.50% had children under the age of 18 living with them, 62.70% were married couples living together, 5.70% had a female householder with no husband present, and 28.80% were non-families. 24.90% of all households were made up of individuals and 6.70% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.92.

In the county the population was spread out with 25.80% under the age of 18, 4.40% from 18 to 24, 27.70% from 25 to 44, 30.00% from 45 to 64, and 12.10% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 101.40 males. For every 100 females age 18 and over, there were 99.70 males.

The median income for a household in the county was $78,993, and the median income for a family was $90,032. Males had a median income of $70,063 versus $40,246 for females. The per capita income for the county was $34,646. 2.90% of the population and 1.90% of families were below the poverty line. 1.80% of those under the age of 18 and 4.70% of those 65 and older were living below the poverty line.


County council

The County council was created by the Los Alamos County Charter. The Council consists of seven members elected at large for four-year, staggered terms. Each year the party in control of the council selects the new chair.[11]

Position Name Party reg.
County councilor, Chair Kristin Henderson Democrat
County councilor, Vice Chair David Izraelevitz Democrat
County councilor, At-large James Chrobocinski Republican
County councilor, At–large Steven Girrens Republican
County councilor, At–large Susan O'Leary Democrat
County councilor, At–large Rick Reiss Republican
County councilor, At–large Pete Sheehey Democrat

County offices

Name Position Party reg.
County Assessor Kenneth Milder Democrat
County Clerk Sharon Stover Republican
Municipal Judge Alan S. Kirk Republican
Sheriff Marco Lucero Democrat

Quality of life

In a study conducted by American City Business Journals in 2004, Los Alamos County topped the list as the best place to live in America in terms of quality of life. This was attributed to the high levels of job stability, income and education of Los Alamos residents, many of whom are employed as scientists and engineers at the Los Alamos National Laboratory. The county has one of the highest number of PhDs per capita[citation needed] and the 2011 median household income of $110,204 per year is the second highest among all the counties in the US. In per capita income, Los Alamos County ranks 1st in New Mexico and 18th in the United States, and has the second-lowest level of poverty in the United States, and the lowest level of child poverty.[3] Other factors contributing to Los Alamos's high quality-of-life index were the access to affordable housing and short commuting times.


See also


  1. 1.0 1.1 "State & County QuickFacts". United States Census Bureau. Retrieved September 29, 2013.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  2. "Find a County". National Association of Counties. Retrieved June 7, 2011.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  3. 3.0 3.1 "Table 1: 2011 Poverty and Median Income Estimates - Counties". Small Area Income and Poverty Estimates. U.S. Census Bureau. 2011.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  4. "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved January 2, 2015.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  5. "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2014". Retrieved June 4, 2015.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  6. "U.S. Decennial Census". United States Census Bureau. Retrieved January 2, 2015.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  7. "Historical Census Browser". University of Virginia Library. Retrieved January 2, 2015.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  8. "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved January 2, 2015.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  9. "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved January 2, 2015.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  10. "American FactFinder". United States Census Bureau. Retrieved January 31, 2008.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  11. "Los Alamos County Council". Los Alamos County Official County Web Site. losalamosnm.us. Retrieved June 24, 2015.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>

External links

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