Data / Rankings / Population density / Counties in New Mexico

Counties in New Mexico by population density, 2025

Bernalillo County had the highest population density of 33 counties in 2025, at 221.9 inhabitants per km². Harding County had the lowest, at 0.1 inhabitants per km². The median was 2.7 inhabitants per km² and the figure for New Mexico was 6.8 inhabitants per km². Source: the U.S. Census Bureau.

Highest221.9Bernalillo County
Lowest0.1Harding County
Median2.733 counties
New Mexico6.8History

All counties, 2025

CSVChart (SVG)

Bernalillo CountyBernalillo County: 221.9 inhabitants per km²221.9Los Alamos CountyLos Alamos County: 68.7 inhabitants per km²68.7Santa Fe CountySanta Fe County: 31.7 inhabitants per km²31.7Valencia CountyValencia County: 29.7 inhabitants per km²29.7Doña Ana CountyDoña Ana County: 23.2 inhabitants per km²23.2Sandoval CountySandoval County: 16.6 inhabitants per km²16.6Curry CountyCurry County: 12.8 inhabitants per km²12.8San Juan CountySan Juan County: 8.4 inhabitants per km²8.4Lea CountyLea County: 6.6 inhabitants per km²6.6Taos CountyTaos County: 6.1 inhabitants per km²6.1Eddy CountyEddy County: 5.8 inhabitants per km²5.8McKinley CountyMcKinley County: 4.8 inhabitants per km²4.8Otero CountyOtero County: 4.1 inhabitants per km²4.1Chaves CountyChaves County: 4 inhabitants per km²4Luna CountyLuna County: 3.3 inhabitants per km²3.3Roosevelt CountyRoosevelt County: 2.9 inhabitants per km²2.9Grant CountyGrant County: 2.7 inhabitants per km²2.7Rio Arriba CountyRio Arriba County: 2.6 inhabitants per km²2.6Cibola CountyCibola County: 2.3 inhabitants per km²2.3San Miguel CountySan Miguel County: 2.1 inhabitants per km²2.1Torrance CountyTorrance County: 1.9 inhabitants per km²1.9Lincoln CountyLincoln County: 1.6 inhabitants per km²1.6Colfax CountyColfax County: 1.3 inhabitants per km²1.3Quay CountyQuay County: 1.1 inhabitants per km²1.1Sierra CountySierra County: 1.1 inhabitants per km²1.1Socorro CountySocorro County: 0.9 inhabitants per km²0.9Mora CountyMora County: 0.8 inhabitants per km²0.8Guadalupe CountyGuadalupe County: 0.6 inhabitants per km²0.6Hidalgo CountyHidalgo County: 0.4 inhabitants per km²0.4Union CountyUnion County: 0.4 inhabitants per km²0.4De Baca CountyDe Baca County: 0.3 inhabitants per km²0.3Catron CountyCatron County: 0.2 inhabitants per km²0.2Harding CountyHarding County: 0.1 inhabitants per km²0.1
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2025
inhabitants per km²		Change on 2024
1Bernalillo County221.9-0.4%
2Los Alamos County68.7-0.1%
3Santa Fe County31.7-0.3%
4Valencia County29.7+1.4%
5Doña Ana County23.2+0.4%
6Sandoval County16.6+1.2%
7Curry County12.8-1.5%
8San Juan County8.4-0.1%
9Lea County6.6+0.4%
10Taos County6.1+0.3%
11Eddy County5.8+1.2%
12McKinley County4.8-0.7%
13Otero County4.1-0.4%
14Chaves County4-0.6%
15Luna County3.3-0.8%
16Roosevelt County2.9-0.9%
17Grant County2.7-0.9%
18Rio Arriba County2.6-0.3%
19Cibola County2.3+0.2%
20San Miguel County2.1-0.7%
21Torrance County1.9+1%
22Lincoln County1.6-0.9%
23Colfax County1.3-1%
24Quay County1.1-1%
25Sierra County1.1-0.2%
26Socorro County0.9-0.5%
27Mora County0.8-1%
28Guadalupe County0.6-0.5%
29Hidalgo County0.4-0.7%
30Union County0.4-2.5%
31De Baca County0.30%
32Catron County0.20%
33Harding County0.1-0.9%

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

Which county has the highest population density?

Bernalillo County, with 221.9 inhabitants per km² in 2025, according to the U.S. Census Bureau.

Which county has the lowest population density?

Harding County, with 0.1 inhabitants per km² in 2025.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.

Population density: other rankings

Counties in New Mexico: more rankings