How many people live in San Miguel County, NM?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 26,400 people living in San Miguel County, NM. That makes San Miguel County the 17th-most populous county in New Mexico. It is home to 1.2% of people living in the state.
26.4K
population of San Miguel County, NM (2024)
1.2%
County share of the New Mexico population (2024)
About 26,400 people lived in San Miguel County, NM in 2024.
Population estimates, 2000–2024
What are San Miguel County, NM’s age demographics?
About 7,100 San Miguel County, NM residents are aged 65 and older in 2024. That represents 26.9% of its population. For comparison, the age group represents 20.3% of New Mexico’s population and 18% in the US overall.
Another 4,200 San Miguel County residents, or 16% of the population, were children under 18. For comparison, the age group represents 21.2% of New Mexico’s population and 21.6% in the US overall.
A higher share of San Miguel County, NM's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are San Miguel County, NM’s racial and ethnic demographics?
Hispanic residents make up 75.2% of the San Miguel County, NM population, higher than the national share of 20%. San Miguel County, NM also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (1.3%) than the US overall (0.72%).
In contrast, San Miguel County’s non-Hispanic white population accounts for 19.8%, below the 57.5% nationwide, and the non-Hispanic Black or African American population makes up 1.6% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
San Miguel County, NM has a higher share of a Hispanic population than New Mexico as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in San Miguel County is Las Vegas with about 12,700 residents in 2024.
Cities and towns in San Miguel County, NM ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Las Vegas | 12,711 |
| 2. | Pecos | 1,372 |
| 3. | Mosquero (pt.) | |
| 4. | Balance of San Miguel County | 12,345 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
