Counties in New Mexico by population, 2025

Name: Counties in New Mexico by population, 2025
Creator: U.S. Census Bureau
License: Public domain (US federal government work, citation requested)

Bernalillo County had the highest population of 33 counties in 2025, at 667,601. Harding County had the lowest, at 617. The median was 26,260 and the figure for New Mexico was 2.13 million. Source: the U.S. Census Bureau.

Highest667,601Bernalillo County

Lowest617Harding County

Median26,26033 counties

New Mexico2,125,498History

All counties, 2025

CSV Chart (SVG)

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

Full ranking

Rank	Counties	2025 persons	Change on 2024
1	Bernalillo County	667,601	-0.4%
2	Doña Ana County	229,091	+0.4%
3	Sandoval County	159,565	+1.2%
4	Santa Fe County	156,907	-0.3%
5	San Juan County	120,340	-0.2%
6	Valencia County	82,013	+1.4%
7	Lea County	74,749	+0.4%
8	Otero County	70,368	-0.4%
9	McKinley County	68,119	-0.7%
10	Chaves County	63,364	-0.6%
11	Eddy County	62,509	+1.1%
12	Curry County	46,655	-1.5%
13	Rio Arriba County	39,832	-0.3%
14	Taos County	34,564	+0.4%
15	Grant County	27,252	-0.9%
16	Cibola County	26,807	+0.2%
17	San Miguel County	26,260	-0.7%
18	Luna County	25,407	-0.8%
19	Lincoln County	19,844	-1%
20	Los Alamos County	19,407	-0.1%
21	Roosevelt County	18,615	-0.9%
22	Torrance County	16,100	+1%
23	Socorro County	15,838	-0.6%
24	Colfax County	12,184	-1%
25	Sierra County	11,395	-0.2%
26	Quay County	8,454	-1%
27	Guadalupe County	4,343	-0.4%
28	Mora County	4,051	-1%
29	Hidalgo County	3,929	-0.6%
30	Union County	3,844	-2.4%
31	Catron County	3,827	+0.1%
32	De Baca County	1,647	-0.2%
33	Harding County	617	-0.6%

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.

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 using official data, and cite the source.

rank_places {"indicator":"population","level":"province","within":"New Mexico","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population&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?

Bernalillo County, with 667,601 in 2025, according to the U.S. Census Bureau.

Which county has the lowest population?

Harding County, with 617 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, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved 2026-10-08.