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San Miguel County, New Mexico facts for kids

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San Miguel County
San Miguel County Courthouse in Las Vegas
San Miguel County Courthouse in Las Vegas
Map of New Mexico highlighting San Miguel County
Location within the U.S. state of New Mexico
Map of the United States highlighting New Mexico
New Mexico's location within the U.S.
Country  United States
State  New Mexico
Founded January 9, 1852
Named for San Miguel del Vado
Seat Las Vegas
Largest city Las Vegas
 • Total 4,736 sq mi (12,270 km2)
 • Land 4,716 sq mi (12,210 km2)
 • Water 20 sq mi (50 km2)  0.4%%
 • Estimate 
 • Density 6.2/sq mi (2.4/km2)
Time zone UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)
Congressional district 3rd

San Miguel County is a county in the U.S. state of New Mexico. As of the 2010 census, the population was 29,393. Its county seat is Las Vegas.

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


According to the U.S. Census Bureau, the county has a total area of 4,736 square miles (12,270 km2), of which 4,716 square miles (12,210 km2) is land and 20 square miles (52 km2) (0.4%) is water.

Adjacent counties

National protected areas


Historical population
Census Pop.
1910 22,930
1920 22,867 −0.3%
1930 23,636 3.4%
1940 27,910 18.1%
1950 26,512 −5.0%
1960 23,468 −11.5%
1970 21,951 −6.5%
1980 22,751 3.6%
1990 25,743 13.2%
2000 30,126 17.0%
2010 29,393 −2.4%
2019 (est.) 27,277 −7.2%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2016

2010 census

As of the 2010 census, there were 29,393 people, 11,978 households, and 7,275 families living in the county. The population density was 6.2 inhabitants per square mile (2.4/km2). There were 15,595 housing units at an average density of 3.3 per square mile (1.3/km2). The racial makeup of the county was 66.6% white, 1.7% American Indian, 1.4% black or African American, 0.8% Asian, 0.1% Pacific islander, 25.4% from other races, and 3.9% from two or more races. Those of Hispanic or Latino origin made up 76.8% of the population. In terms of ancestry, 6.3% were German, 5.3% were English, and 1.6% were American.

Of the 11,978 households, 28.8% had children under the age of 18 living with them, 38.6% were married couples living together, 14.9% had a female householder with no husband present, 39.3% were non-families, and 32.5% of all households were made up of individuals. The average household size was 2.34 and the average family size was 2.95. The median age was 40.7 years.

The median income for a household in the county was $32,213 and the median income for a family was $42,888. Males had a median income of $35,176 versus $28,351 for females. The per capita income for the county was $18,508. About 15.7% of families and 24.8% of the population were below the poverty line, including 29.6% of those under age 18 and 22.7% of those age 65 or over.




Census-designated places

Other communities

Ghost town

Notable people

  • Antonia Apodaca (1923–2020) born in Rociada, folk musician and composer
  • Margaret Larkin (1899–1967), born in Las Vegas, writer and musician
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