Census ACS 2023 · 33 counties
Largest Counties in New Mexico
New Mexico has 33 counties with Census data available. The largest is Bernalillo County with a population of 674,357. County-level data is important because counties are the primary unit of local government in most states, responsible for courts, elections, public health, and infrastructure. Population distribution across counties reveals where growth is concentrated and where rural decline may be occurring.
Source: Census ACS 2023 5-Year Estimates
| # | County | Population | Median Income |
|---|---|---|---|
| 1 | Valencia County | 77,382 | $58,333 |
| 2 | Union County | 4,039 | $45,319 |
| 3 | Torrance County | 15,290 | $46,250 |
| 4 | Taos County | 34,516 | $58,908 |
| 5 | Socorro County | 16,308 | $47,556 |
| 6 | Sierra County | 11,511 | $37,840 |
| 7 | Santa Fe County | 155,175 | $74,689 |
| 8 | Sandoval County | 151,538 | $84,053 |
| 9 | San Miguel County | 27,036 | $47,400 |
| 10 | San Juan County | 121,178 | $53,020 |
| 11 | Roosevelt County | 19,002 | $52,445 |
| 12 | Rio Arriba County | 40,165 | $53,901 |
| 13 | Quay County | 8,616 | $43,698 |
| 14 | Otero County | 68,235 | $52,717 |
| 15 | Mora County | 4,176 | $50,178 |
| 16 | McKinley County | 71,172 | $44,496 |
| 17 | Luna County | 25,420 | $37,917 |
| 18 | Los Alamos County | 19,374 | $143,188 |
| 19 | Lincoln County | 20,227 | $51,643 |
| 20 | Lea County | 73,154 | $68,750 |
| 21 | Hidalgo County | 4,097 | $49,076 |
| 22 | Harding County | 748 | $41,250 |
| 23 | Guadalupe County | 4,379 | $40,149 |
| 24 | Grant County | 27,856 | $45,921 |
| 25 | Eddy County | 61,114 | $79,605 |
| 26 | Doña Ana County | 221,665 | $55,663 |
| 27 | De Baca County | 1,580 | $40,804 |
| 28 | Curry County | 47,932 | $56,259 |
| 29 | Colfax County | 12,336 | $52,690 |
| 30 | Cibola County | 27,059 | $51,765 |
| 31 | Chaves County | 64,446 | $52,029 |
| 32 | Catron County | 3,685 | $46,439 |
| 33 | Bernalillo County | 674,357 | $66,514 |
More Rankings for New Mexico
Frequently Asked Questions
Bernalillo County is the #1 ranked county in New Mexico by population, with a value of 674,357 according to Census ACS 2023 data.
New Mexico has 33 counties tracked in Census ACS 2023 data.
All data comes from the American Community Survey (ACS) 2023 5-Year estimates by the US Census Bureau.
Data from the American Community Survey 2023 5-Year estimates. Covers all counties in New Mexico.