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Where am ILOCATED

Union County, New Mexico

Union County, New Mexico, has 3,844 residents (July 2025 estimate). Its county seat is Clayton. It uses Mountain Time and covers 3,825 sq mi (9,907 km²) of land.

AlbuquerqueLas CrucesRio Rancho
Union County in New Mexico
Colfax CountyHarding CountyCimarron CountyDallam CountyHartley CountyClaytonDes MoinesCapulinGrenvilleFolsom
Union County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
3,844
Land area
3,825 sq mi (9,907 km²)
County seat or government
Clayton
Time zone
Mountain TimeUTC-07:00 in January; UTC-06:00 in July
Median household income
$46,694 ± $17,202
Median home value
$122,700 ± $18,473
Median rent, with utilities
$683 ± $120
Homes lived in by their owners
72.4% ± 7.7 points
County type
County
Metro or micro area
Outside any metro or micro area
Water area
5.98 sq mi (15.5 km²)
State
New Mexico
County code (FIPS)
35059
Coordinates (central point)
36.488085, -103.475723
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Union County

Time zoneLocal time and UTC offsetNext clock change
Mountain TimeAmerica/DenverUTC-07:00 in January; UTC-06:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 884153,178 people
  2. 88418536 people
  3. 88430250 people
  4. 88414137 people
  5. 88422117 people
  6. 8842489 people
  7. 8841961 people
  8. 8841045 people
  9. 8843625 people

9 ZIP Code areas overlap Union County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

School districts in Union County, largest first

  1. Clayton Public Schools3,272 people
  2. Springer Municipal Schools1,943 people
  3. Des Moines Municipal Schools741 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Clayton, New Mexico (town)2,753 people
  2. Des Moines, New Mexico (village)174 people
  3. Capulin, New Mexico (CDP)79 people
  4. Grenville, New Mexico (village)56 people
  5. Folsom, New Mexico (village)11 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Harding County, New Mexico48 mi southwest
  2. Dallam County, Texas51 mi east
  3. Cimarron County, Oklahoma56 mi east
  4. Colfax County, New Mexico65 mi west
  5. Las Animas County, Colorado65 mi northwest
  6. Hartley County, Texas66 mi southeast
  7. Baca County, Colorado77 mi northeast
  8. Quay County, New Mexico96 mi south

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.