Union County, New Mexico Cities (2025)

5 cities

City
Rank
2025 Pop.
2020 Pop.
Change
Density
Area (mi²)
Type
Clayton12,5362,648-0.86%3257.81 Town
Des Moines2110115-0.9%1260.87 Village
Capulin393198.14%631.48 CDP
Folsom446480%710.65 Village
Grenville525240%660.38 Village

Union County Cities Summary

Largest City

Clayton is the largest city in Union County, with a population of 2,536.

Smallest City

Grenville is the smallest city in Union County.

10 Largest Cities

There are 5 cities in Union County, New Mexico.

Location of Union County