How many people live in Sierra County, NM?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 11,400 people living in Sierra County, NM. That makes Sierra County the 25th-most populous county in New Mexico. It is home to 0.54% of people living in the state.
11.4K
population of Sierra County, NM (2024)
0.54%
County share of the New Mexico population (2024)
About 11,400 people lived in Sierra County, NM in 2024.
Population estimates, 2000–2024
What are Sierra County, NM’s age demographics?
About 4,500 Sierra County, NM residents are aged 65 and older in 2024. That represents 39.2% of its population. For comparison, the age group represents 20.3% of New Mexico’s population and 18% in the US overall.
Another 1,800 Sierra 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 Sierra County, NM's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Sierra County, NM’s racial and ethnic demographics?
Non-Hispanic white residents make up 63.4% of the Sierra County, NM population, higher than the national share of 57.5%. Sierra County, NM also has a larger share of people identifying as Hispanic (31.1%) than the US overall (20%).
In contrast, Sierra County’s non-Hispanic Black or African American population accounts for 1.1%, below the 12.6% nationwide, and the non-Hispanic Asian population makes up 0.74% of the county, compared with 6.5% 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.
Sierra County, NM has a higher share of a non-Hispanic white population than New Mexico as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Sierra County, NM is Truth or Consequences with about 5,900 residents in 2024.
Cities and towns in Sierra County, NM ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Truth or Consequences | 5,942 |
| 2. | Elephant Butte | 1,439 |
| 3. | Williamsburg | 460 |
| 4. | Balance of Sierra County | 3,548 |
Keep exploring
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.
