Los Alamos County, New Mexico

Los Alamos County is a located in the  of. In, its population was 18,343. The county was administered exclusively by the during the, but now has equal status to New Mexico's other counties. The of the county is at the townsite of. The county is home to the.

Geography
According to the, the county has a total area of 283 (109 ). Los Alamos County is the smallest county in New Mexico by area. There is no significant open water in the county. The county's highest point is located along its northern border, near the of, at 10,480 feet above.

Adjacent counties

 * - north
 * - east
 * - south, west

Demographics
As of the of 2000, there were 18,343 people, 7,497 households, and 5,337 families residing in the county. The was 65/km² (168/sq mi). There were 7,937 housing units at an average density of 28/km² (73/sq mi). The racial makeup of the county was 90.26%, 0.37% or , 0.58% , 3.78% , 0.03% , 2.70% from , and 2.28% from two or more races. 11.75% of the population were or  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 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 for the county was $34,646. 2.90% of the population and 1.90% of families were below the. 1.80% of those under the age of 18 and 4.70% of those 65 and older were living below the poverty line.

Quality of living
In a study conducted by  in, Los Alamos County topped the list as the best place to live in America in terms of. 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. The county has one of the highest number of PhDs per capita  and the   household income of $78,993 per year is the fourth highest among all the counties in the US. Other factors contributing to Los Alamos's high quality-of-life index were the access to affordable housing and short commuting times.