Data / Rankings / Population density / Counties in New Mexico

Counties in New Mexico by population density

Bernalillo County had the highest population density of 33 counties in 2020, at 225 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 6.7 inhabitants per km². Source: the U.S. Census Bureau.

Highest225Bernalillo County
Lowest0.1Harding County
Median2.733 counties
New Mexico6.7History

All counties, 2020

CSVChart (SVG)

Bernalillo CountyBernalillo County: 225 inhabitants per km²225Los Alamos CountyLos Alamos County: 68.7 inhabitants per km²68.7Santa Fe CountySanta Fe County: 31.3 inhabitants per km²31.3Valencia CountyValencia County: 27.7 inhabitants per km²27.7Doña Ana CountyDoña Ana County: 22.3 inhabitants per km²22.3Sandoval CountySandoval County: 15.5 inhabitants per km²15.5Curry CountyCurry County: 13.3 inhabitants per km²13.3San Juan CountySan Juan County: 8.5 inhabitants per km²8.5Lea CountyLea County: 6.6 inhabitants per km²6.6Taos CountyTaos County: 6 inhabitants per km²6Eddy CountyEddy County: 5.8 inhabitants per km²5.8McKinley CountyMcKinley County: 5.1 inhabitants per km²5.1Chaves CountyChaves County: 4.1 inhabitants per km²4.1Otero CountyOtero County: 4 inhabitants per km²4Luna CountyLuna County: 3.3 inhabitants per km²3.3Roosevelt CountyRoosevelt County: 3 inhabitants per km²3Grant CountyGrant County: 2.7 inhabitants per km²2.7Rio Arriba CountyRio Arriba County: 2.7 inhabitants per km²2.7Cibola CountyCibola County: 2.3 inhabitants per km²2.3San Miguel CountySan Miguel County: 2.2 inhabitants per km²2.2Torrance CountyTorrance County: 1.7 inhabitants per km²1.7Lincoln CountyLincoln County: 1.6 inhabitants per km²1.6Colfax CountyColfax County: 1.3 inhabitants per km²1.3Quay CountyQuay County: 1.2 inhabitants per km²1.2Sierra CountySierra County: 1.1 inhabitants per km²1.1Socorro CountySocorro County: 1 inhabitants per km²1Mora CountyMora County: 0.8 inhabitants per km²0.8Guadalupe CountyGuadalupe County: 0.6 inhabitants per km²0.6Hidalgo CountyHidalgo County: 0.5 inhabitants per km²0.5Union 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

RankCounties2020
inhabitants per km²
1Bernalillo County225
2Los Alamos County68.7
3Santa Fe County31.3
4Valencia County27.7
5Doña Ana County22.3
6Sandoval County15.5
7Curry County13.3
8San Juan County8.5
9Lea County6.6
10Taos County6
11Eddy County5.8
12McKinley County5.1
13Chaves County4.1
14Otero County4
15Luna County3.3
16Roosevelt County3
17Grant County2.7
18Rio Arriba County2.7
19Cibola County2.3
20San Miguel County2.2
21Torrance County1.7
22Lincoln County1.6
23Colfax County1.3
24Quay County1.2
25Sierra County1.1
26Socorro County1
27Mora County0.8
28Guadalupe County0.6
29Hidalgo County0.5
30Union County0.4
31De Baca County0.3
32Catron County0.2
33Harding County0.1

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.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in New Mexico by population density using official data, and cite the source.
rank_places {"indicator":"population_density","level":"province","within":"New Mexico","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_density&level=province&within=New%20Mexico&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest population density?

Bernalillo County, with 225 inhabitants per km² in 2020, according to the U.S. Census Bureau.

Which county has the lowest population density?

Harding County, with 0.1 inhabitants per km² in 2020.

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