Union County, New Mexico
Union County: county in New Mexico, United States
About
Union County is a county located in the U.S. state of New Mexico. As of the 2010 census, the population was 4,549. After 10 years in 2020 county had an estimated population of 4,026 inhabitants. Its county seat is Clayton. The county was created 132 years ago in 1893.
County Snapshot
Union County at a glance
Union County currently has 4 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
4
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
New Mexico counties
33
Open related pagesLargest city
ClaytonPopulation 2,660
Top linked places
Quick Facts about Union County
| Population | 4,026 (2020) |
| Country | United States of America |
| State | New Mexico (United States) |
| Different from | Union County, Union County, Union County, Union Parish, Union County, Union County, Union County, Union County, Union County, Union County, Union County, Union County, Union County, Union County, Union County, Union County, Union County |
| Area | 9922 km2 |
| Water as percent of area | 0.2% |
| Land as percent of area | 99.8% |
| Latitude & Longitude | 36.4818,-103.4710 |
| Capital | Clayton |
| Establishment | January 01, 1894 |
| Time Zone | America/Denver |
| Local time | 08:58:37 (17th April 2026) |
| Population growth | -12.99% (2010-2020) |
Geography
Union County is located at 36°28'54"N 103°28'16"W (36.4817600, -103.4709900). It has 8 neighbors: Baca County, Las Animas County, Colfax County, Harding County, Quay County, Cimarron County, Dallam County and Hartley County.
Union County map
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The largest city of Union County is Clayton with a population of 2,660. Other cities include, Des Moines population 121, Folsom population 53 and Grenville population 29. See all Union County cities & populated places.
Union County Populated Places
Cities, towns, neighborhoods & other populated places in Union County.
| City Name | Population | Title |
|---|---|---|
| Clayton | 2,660 | Town in New Mexico |
| Des Moines | 121 | Town |
| Folsom | 53 | Town in New Mexico, United States |
| Grenville | 29 | Human settlement in Union County, New Mexico, United States of America |
Official website of Union County
Official Website- Clayton
Demographics
According to census records, the population of Union County decreased by 12.99% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 4,549 | - | census |
| 2011 | 4,410 | -3.15% | estimation process |
| 2012 | 4,400 | -0.23% | estimation process |
| 2013 | 4,347 | -1.22% | estimation process |
| 2014 | 4,246 | -2.38% | estimation process |
| 2015 | 4,163 | -1.99% | estimation process |
| 2016 | 4,154 | -0.22% | estimation process |
| 2017 | 4,180 | 0.62% | estimation process |
| 2018 | 4,108 | -1.75% | estimation process |
| 2019 | 4,059 | -1.21% | estimation process |
| 2020 | 4,026 | -0.82% | estimation process |
Other places with the same name (16)
- Union County, New Jersey county in Oregon, United States with a population of 555,394 people.
- Union County, North Carolina county in North Carolina, United States with a population of 244,562 people.
- Union County, Ohio county in Ohio, United States with a population of 60,021 people.
- Union County, Pennsylvania county in Pennsylvania, United States with a population of 44,294 people.
- Union County, Arkansas county in Arkansas, United States with a population of 38,219 people.
- Union County, Mississippi county in Mississippi, United States with a population of 28,866 people.
- Union County, South Carolina county in South Carolina, United States with a population of 26,991 people.
- Union County, Oregon county in Oregon, United States with a population of 26,551 people.
- Union County, Georgia county in Georgia, United States with a population of 25,358 people.
- Union County, Tennessee county in Tennessee, United States with a population of 20,187 people.
- Union County, Illinois county in Illinois, United States with a population of 16,498 people.
- Union County, South Dakota county in South Dakota, United States with a population of 16,192 people.
- Union County, Florida county in Florida, United States with a population of 15,182 people.
- Union County, Kentucky county in Kentucky, United States with a population of 14,443 people.
- Union County, Iowa county in Iowa, United States with a population of 12,157 people.
- Union County, Indiana county in Indiana, United States with a population of 7,119 people.
New Mexico Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Bernalillo County | 681,666 | County in New Mexico, United States |
| Albuquerque | 562,540 | The third most populous city in New Mexico and the center of the Albuquerque metropolitan area. |
| Doña Ana County | 221,262 | County in New Mexico, United States |
| Santa Fe County | 151,946 | County in New Mexico, United States |
| Sandoval County | 148,904 | County in New Mexico, United States |
| San Juan County | 123,312 | County in southeastern Utah, United States |
| Las Cruces | 105,096 | The second most populous city in New Mexico. |
| Rio Rancho | 99,885 | The second most populous city in Sandoval County, New Mexico. |
| Santa Fe | 84,996 | The capital of New Mexico. |
| Valencia County | 77,574 | County in New Mexico, United States |
| Lea County | 71,830 | County in New Mexico, United States |
| McKinley County | 70,824 | County in New Mexico, United States |
| Otero County | 67,967 | County in New Mexico, United States |
| Chaves County | 64,711 | County in New Mexico, United States |
| Eddy County | 58,418 | County in New Mexico, United States |
| Curry County | 48,793 | County in Oregon, United States |