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Sierra County

Facts about Sierra County, New Mexico

Sierra County is a county in the U.S. state of New Mexico. As of the 2010 census, the population was 11,988. Its county seat is Truth or Consequences.


According to the U.S. Census Bureau, the county has a total area of 4,236 square miles (10,970 km²), of which 4,179 square miles (10,820 km²) is land and 57 square miles (150 km²) (1.4%) is water.


As of the 2010 census, there were 11,988 people, 5,917 households, and 3,126 families residing in the county. The population density was 2.9 inhabitants per square mile (1.1/km²). There were 8,356 housing units at an average density of 2.0 per square mile (0.77/km²). The racial makeup of the county was 85.6% white, 1.7% American Indian, 0.4% black or African American, 0.4% Asian, 8.6% from other races, and 3.3% from two or more races. Those of Hispanic or Latino origin made up 28.0% of the population. In terms of ancestry, 14.0% were German, 9.4% were American, 8.4% were English, and 8.0% were Irish.

Of the 5,917 households, 17.8% had children under the age of 18 living with them, 40.0% were married couples living together, 8.9% had a female householder with no husband present, 47.2% were non-families, and 40.8% of all households were made up of individuals. The average household size was 1.98 and the average family size was 2.64. The median age was 54.5 years.



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Sierra County 505-933-7959