Union County, New Mexico Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 30th-largest in New Mexico
The population of Union County, New Mexico is 4,039 as of the 2023 American Community Survey, making it the 30th-largest county in New Mexico. The median household income is $45,319, the median home value is $135,900, and the median age is 40.3.
The population of Union County has declined 13.5% since 2010 (4,541 → 3,926), a -1.03% annualized rate.
4,039
Population
-1.03%
Annual growth
1
People / sq mi
$45,319
Median Income
$135,900
Median Home Value
Union County covers 3,825 sq mi of land at 1.1 people per square mile.
About Union County, NM
Union County is a county in New Mexico with a population of 4,039. It ranks #30 among counties in New Mexico by population. The median age is 40.3, older than the national median. The population is 54.0% male and 46.0% female.
The median household income in Union County is $45,319, below the US median of $74,580. 16.7% of residents live below the federal poverty level. Home values sit at a median of $135,900, with monthly rent averaging $650. The homeownership rate of 68.2% is higher than the national rate of 64.8%.
Educational attainment in Union County reflects 18.1% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 8.3% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 16.8 minutes each way.
Union County Population History (2010-2024)
The county of Union County had a population of 4,541 in 2010 and 3,926 in 2024, a -13.5% growth over 14 years. The peak was 4,541 in 2010. Average annual growth rate: -1.03%.
3,926
Population (2024)
4,541
Population (2010)
4,541
Peak (2010)
-1.03%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 4,541 |
| 2011 | 4,416 |
| 2012 | 4,408 |
| 2013 | 4,354 |
| 2014 | 4,259 |
| 2015 | 4,174 |
| 2016 | 4,166 |
| 2017 | 4,194 |
| 2018 | 4,099 |
| 2019 | 4,043 |
| 2020 | 4,073 |
| 2021 | 4,099 |
| 2022 | 3,996 |
| 2023 | 3,972 |
| 2024 | 3,926 |
Race & Ethnicity
| White | 69.5% |
| Black or African American | 1.0% |
| Asian | 0.9% |
| Hispanic or Latino (any race) | 7.0% |
| Two or More Races | 0.0% |
Age & Sex
40.3
Median Age
46.0%
Female
54.0%
Male
22.6%
Age 65+
Age Distribution
Children (under 15): 19.4% · Seniors (65+): 22.6%
Income & Poverty
| Median household income | $45,319$-16,806 vs state |
| Mean household income | $99,074 |
| Per-capita income | $37,697 |
| Poverty rate | 16.7%+3.0% vs state |
| Unemployment rate | 3.2% |
| Employment-to-population | 44.6% |
Top Industries by Employment
The largest employment sector in Union County is agriculture, accounting for 20.3% of workers.
How residents commute
0.0%
Drive alone
7.2%
Carpool
76.9%
Public transit
8.3%
Work from home
16.8 min
Avg commute
Housing
$135,900$-96,300 vs state
Median home value
$650
Median rent
68.2%
Homeownership rate
2,091
Total housing units
71.9%
Occupied
28.1%
Vacant
31.8%
Renter-occupied
Social & access
88.2%
With health insurance
82.9%
With broadband internet
42.5%
Foreign-born
6.7%
Veterans (18+)
23.3%
With a disability
79.1%
Speak language other than English at home
Education
88.9%
High School+
18.1%
Bachelor's+
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Part of New Mexico
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County rankings
Frequently Asked Questions
Union County, New Mexico has a population of 4,039 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 30th-largest county in New Mexico. Population density is 1 people per square mile.
The population of Union County has declined 13.5% since 2010 (4,541 → 3,926), a -1.03% annualized rate.
The median household income in Union County, New Mexico is $45,319, with mean (average) household income of $99,074 and per-capita income of $37,697. 16.7% of residents live below the federal poverty level.
In Union County, the largest racial and ethnic groups are White (69.5%), Hispanic or Latino (7.0%), Black or African American (1.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Union County, New Mexico is 40.3 years. Residents are 46.0% female and 54.0% male.
The median home value in Union County is $135,900 and median monthly rent is $650. 68.2% of occupied housing units are owner-occupied. The county has 2,091 total housing units, 28.1% of which are vacant.
The largest employment sector in Union County, New Mexico is agriculture, forestry, fishing, and mining, employing 20.3% of workers. The unemployment rate is 3.2%.
Albuquerque is among the largest cities associated with Union County, New Mexico, with a population of 562,488.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.