Counties in New Mexico by population

Name: Counties in New Mexico by population, 2024
Creator: U.S. Census Bureau
License: Public domain (US federal government work, citation requested)

Bernalillo County had the highest population of 33 counties in 2024, at 670,181. Harding County had the lowest, at 621. The median was 26,434 and the figure for New Mexico was 2.13 million. Source: the U.S. Census Bureau.

Highest670,181Bernalillo County

Lowest621Harding County

Median26,43433 counties

New Mexico2,126,774History

All counties, 2024

CSV Chart (SVG)

persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

Rank	Counties	2024 persons	Change on 2023
1	Bernalillo County	670,181	-0.2%
2	Doña Ana County	228,104	+0.9%
3	Sandoval County	157,611	+1.1%
4	Santa Fe County	157,320	+0.6%
5	San Juan County	120,525	-0.2%
6	Valencia County	80,894	+2.1%
7	Lea County	74,446	+1.7%
8	Otero County	70,624	+1.1%
9	McKinley County	68,631	-0.2%
10	Chaves County	63,746	+0.1%
11	Eddy County	61,799	+1.7%
12	Curry County	47,377	-0.1%
13	Rio Arriba County	39,948	+0.1%
14	Taos County	34,441	0%
15	Grant County	27,491	+0.1%
16	Cibola County	26,755	-0.1%
17	San Miguel County	26,434	-0.8%
18	Luna County	25,623	+0.3%
19	Lincoln County	20,036	-0%
20	Los Alamos County	19,427	+0.6%
21	Roosevelt County	18,785	-0.5%
22	Torrance County	15,942	+1.6%
23	Socorro County	15,930	-0.4%
24	Colfax County	12,311	-0.2%
25	Sierra County	11,413	-1.2%
26	Quay County	8,542	-0.8%
27	Guadalupe County	4,362	+0.9%
28	Mora County	4,092	-0.7%
29	Hidalgo County	3,951	-0.7%
30	Union County	3,939	-0.7%
31	Catron County	3,823	+0.1%
32	De Baca County	1,650	-1.3%
33	Harding County	621	-3.1%

Other periods

About this ranking

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

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. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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Rank Counties in New Mexico by population using official data, and cite the source.

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Questions

Which county has the highest population?

Bernalillo County, with 670,181 in 2024, according to the U.S. Census Bureau.

Which county has the lowest population?

Harding County, with 621 in 2024.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved 2026-10-08.