New Mexico county populations
33 supported county-equivalent records in New Mexico; July 1, 2025 population, 2024–2025 growth and 2025 land-area density.
Population totals use July 1, 2025 observations from PEP Vintage 2025. Change is measured since July 1, 2024. County equivalents are included, including Connecticut planning regions. Missing density is displayed as unavailable, never as zero.
Population table and filters
Whole-dataset downloads| Place | Population · 2025 | Change · 2024–25 | Growth · 2024–25 | People / sq. mi. |
|---|---|---|---|---|
| Bernalillo CountyNew Mexico · County equivalent · 35001 | 667,601 | -2,580 | -0.38% | 574.9 |
| Doña Ana CountyNew Mexico · County equivalent · 35013 | 229,091 | +987 | +0.43% | 60.2 |
| Sandoval CountyNew Mexico · County equivalent · 35043 | 159,565 | +1,954 | +1.24% | 43.0 |
| Santa Fe CountyNew Mexico · County equivalent · 35049 | 156,907 | -413 | -0.26% | 82.1 |
| San Juan CountyNew Mexico · County equivalent · 35045 | 120,340 | -185 | -0.15% | 21.8 |
| Valencia CountyNew Mexico · County equivalent · 35061 | 82,013 | +1,119 | +1.38% | 76.9 |
| Lea CountyNew Mexico · County equivalent · 35025 | 74,749 | +303 | +0.41% | 17.0 |
| Otero CountyNew Mexico · County equivalent · 35035 | 70,368 | -256 | -0.36% | 10.6 |
| McKinley CountyNew Mexico · County equivalent · 35031 | 68,119 | -512 | -0.75% | 12.5 |
| Chaves CountyNew Mexico · County equivalent · 35005 | 63,364 | -382 | -0.60% | 10.4 |
| Eddy CountyNew Mexico · County equivalent · 35015 | 62,509 | +710 | +1.15% | 15.0 |
| Curry CountyNew Mexico · County equivalent · 35009 | 46,655 | -722 | -1.52% | 33.2 |
| Rio Arriba CountyNew Mexico · County equivalent · 35039 | 39,832 | -116 | -0.29% | 6.8 |
| Taos CountyNew Mexico · County equivalent · 35055 | 34,564 | +123 | +0.36% | 15.7 |
| Grant CountyNew Mexico · County equivalent · 35017 | 27,252 | -239 | -0.87% | 6.9 |
| Cibola CountyNew Mexico · County equivalent · 35006 | 26,807 | +52 | +0.19% | 5.9 |
| San Miguel CountyNew Mexico · County equivalent · 35047 | 26,260 | -174 | -0.66% | 5.6 |
| Luna CountyNew Mexico · County equivalent · 35029 | 25,407 | -216 | -0.84% | 8.6 |
| Lincoln CountyNew Mexico · County equivalent · 35027 | 19,844 | -192 | -0.96% | 4.1 |
| Los Alamos CountyNew Mexico · County equivalent · 35028 | 19,407 | -20 | -0.10% | 177.8 |
| Roosevelt CountyNew Mexico · County equivalent · 35041 | 18,615 | -170 | -0.90% | 7.6 |
| Torrance CountyNew Mexico · County equivalent · 35057 | 16,100 | +158 | +0.99% | 4.8 |
| Socorro CountyNew Mexico · County equivalent · 35053 | 15,838 | -92 | -0.58% | 2.4 |
| Colfax CountyNew Mexico · County equivalent · 35007 | 12,184 | -127 | -1.03% | 3.2 |
| Sierra CountyNew Mexico · County equivalent · 35051 | 11,395 | -18 | -0.16% | 2.7 |
| Quay CountyNew Mexico · County equivalent · 35037 | 8,454 | -88 | -1.03% | 2.9 |
| Guadalupe CountyNew Mexico · County equivalent · 35019 | 4,343 | -19 | -0.44% | 1.4 |
| Mora CountyNew Mexico · County equivalent · 35033 | 4,051 | -41 | -1.00% | 2.1 |
| Hidalgo CountyNew Mexico · County equivalent · 35023 | 3,929 | -22 | -0.56% | 1.1 |
| Union CountyNew Mexico · County equivalent · 35059 | 3,844 | -95 | -2.41% | 1.0 |
| Catron CountyNew Mexico · County equivalent · 35003 | 3,827 | +4 | +0.10% | 0.6 |
| De Baca CountyNew Mexico · County equivalent · 35011 | 1,647 | -3 | -0.18% | 0.7 |
| Harding CountyNew Mexico · County equivalent · 35021 | 617 | -4 | -0.64% | 0.3 |
Use these comparisons consistently
A larger population does not necessarily mean faster growth. Absolute change measures the number of residents gained or lost; percentage change divides that difference by the starting population. The percentage column here covers one July-to-July interval, rather than a decade or a partial calendar year. Percent growth is suppressed where the starting population is zero.
Density divides the unrounded July 1, 2025 population by matching 2025 Gazetteer land area. It is measured in people per square mile and excludes water area. These geographic averages depend on the size and definition of each unit, so a county’s density is not directly comparable to a built-up city neighborhood.
County-equivalent names and units vary by state. Connecticut planning regions are represented in the current series; linking older county series requires a documented relationship. Incorporated places may cross county boundaries and do not form an exhaustive county breakdown.
Exports contain the current page’s visible rows after filtering, with reference date and release metadata. Use whole-dataset downloads for every row or select a compatible comparison to inspect a longer interval. The initial pep-2025-r1 snapshot remains reproducible when future releases are added.