Ranking of New Mexico Counties By Population in 2021
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2021, the Population for New Mexico was 2.12M. Among all New Mexico counties, Bernalillo County had the highest population (675.41K), followed by Do�a Ana County (221.76K), and Santa Fe County (155.43K).
The chart below shows the top 10 counties, and the table below shows the ranking of all New Mexico counties.
You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.
Related Topics: New Mexico Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2021 Census.
See this for other years:
Ranking of New Mexico Counties By Population in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Bernalillo County | 675410 |
| 2 | Do�a Ana County | 221756 |
| 3 | Santa Fe County | 155429 |
| 4 | Sandoval County | 151509 |
| 5 | San Juan County | 121019 |
| 6 | Valencia County | 77452 |
| 7 | Lea County | 73070 |
| 8 | McKinley County | 71468 |
| 9 | Otero County | 68499 |
| 10 | Chaves County | 64660 |
| 11 | Eddy County | 60870 |
| 12 | Curry County | 47950 |
| 13 | Rio Arriba County | 40219 |
| 14 | Taos County | 34688 |
| 15 | Grant County | 27907 |
| 16 | San Miguel County | 27162 |
| 17 | Cibola County | 27060 |
| 18 | Luna County | 25471 |
| 19 | Lincoln County | 20403 |
| 20 | Los Alamos County | 19397 |
| 21 | Roosevelt County | 18998 |
| 22 | Socorro County | 16304 |
| 23 | Torrance County | 15311 |
| 24 | Colfax County | 12348 |
| 25 | Sierra County | 11524 |
| 26 | Quay County | 8620 |
| 27 | Guadalupe County | 4424 |
| 28 | Mora County | 4190 |
| 29 | Union County | 4099 |
| 30 | Hidalgo County | 4085 |
| 31 | Catron County | 3716 |
| 32 | De Baca County | 1682 |
| 33 | Harding County | 633 |