Los Alamos
county, New Mexico
Los Alamos National Laboratory
Los Alamos, county, north central New Mexico, U.S. It is a scenic area in the Jemez range of the Southern Rocky Mountains. The Santa Fe National Forest covers the county.
The first white settlers arrived in the 1880s, and the county, named for its seat, was established out of parts of Santa Fe and Sandoval counties in 1949; in 1969 the Los Alamos county and city governments were integrated into one government. In land area Los Alamos is the smallest county in New Mexico. The U.S. government owns more than 90 percent of the land, on which nuclear research facilities are located, and nearly 65 percent of the jobs in the county are with the federal government. Area 109 square miles (283 square km). Pop. (2000) 18,343; (2010) 17,950.
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