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In 1876, Bernalillo County absorbed Santa Ana County. Then, in 1903, nine years before New Mexico’/s statehood, Sandoval County was created from the northern part of Bernalillo County. The area that forms Los Alamos County was separated from Sandoval County in 1949. Today Sandoval County is the fastest-growing county in New Mexico.
- 154,000
- 3,714
- Bernalillo
- 1903
A relatively small portion of the county exists as a geographically separate exclave between Los Alamos County and Santa Fe County. This came about when Los Alamos County was created; the land that became the exclave would have been part of Los Alamos but was excluded owing to its sacred status among the local Indians.
- 1903
- Rio Rancho
- Sandoval family
- Bernalillo
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When was Los Alamos County separated from Sandoval County?
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How has Los Alamos County's population changed over the years?
Apr 1, 2010 · Side-by-side comparison between Los Alamos county (NM) and Sandoval county (NM) using the main population, demographic, and social indicators from the United States Census Bureau.
Los Alamos County (English: "The Poplars" or "Cottonwoods"; Spanish: Condado de Los Álamos) is a county in the U.S. state of New Mexico. As of the 2020 census , the population was 19,419. [1] The smallest county by area in the state, Los Alamos County was formerly administered exclusively by the U.S. federal government during the Manhattan ...
- 1949
- 3rd
- Los Alamos
- Los Alamos
Apr 10, 2024 · County changes over time. Over the past 50 years, some counties have merged or split, and the resulting data was redistributed to other counties. The Census Bureau reports population estimates for counties based on their existing boundaries at the end of each decade. Read more.
A relatively small portion of the county exists as a geographically separate exclave between Los Alamos County and Santa Fe County. This came about when Los Alamos County was created; the land that became the exclave would have been part of Los Alamos but was excluded owing to its sacred status among the local Indians.
It became part of Santa Ana County, one of seven political subdivisions created in 1852. Sandoval County was first established as a separate entity on March 10, 1903, nine years before New Mexico’s statehood. The area that forms Los Alamos County was separated from Sandoval County in 1949.
