RANKING · 2025 ESTIMATES · 33 SHOWN OF 33

Fastest growing, New Mexico counties

New Mexico counties ranked by population growth from the 2020 census to 2025. This list covers the 33 counties in New Mexico that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Valencia County, NMNM82,013+7.6%−38.6 pts

02Sandoval County, NMNM159,565+7.2%−34.8 pts

03Torrance County, NMNM16,100+7.0%−57.4 pts

04Catron County, NMNM3,827+6.9%−31.3 pts

05Doña Ana County, NMNM229,091+4.3%−24.6 pts

06Otero County, NMNM70,368+3.7%−16.2 pts

07Santa Fe County, NMNM156,907+1.3%−29.3 pts

08Lea County, NMNM74,749+0.4%+0.9 pts

09Eddy County, NMNM62,509+0.3%−6.0 pts

10Taos County, NMNM34,564+0.2%−29.5 pts

11Los Alamos County, NMNM19,407-0.1%−1.3 pts

12Luna County, NMNM25,407-0.1%−38.2 pts

13San Juan County, NMNM120,340-1.1%−25.3 pts

14Bernalillo County, NMNM667,601-1.3%−17.1 pts

15Rio Arriba County, NMNM39,832-1.3%−21.2 pts

16Cibola County, NMNM26,807-1.3%−8.9 pts

17Sierra County, NMNM11,395-1.6%−35.4 pts

18Colfax County, NMNM12,184-1.6%−11.4 pts

19Lincoln County, NMNM19,844-2.1%−61.0 pts

20Guadalupe County, NMNM4,343-2.4%−15.1 pts

21Chaves County, NMNM63,364-2.8%−8.9 pts

22Roosevelt County, NMNM18,615-3.0%−10.9 pts

23De Baca County, NMNM1,647-3.0%−2.5 pts

24Mora County, NMNM4,051-3.3%−24.8 pts

25Grant County, NMNM27,252-3.3%−15.3 pts

26Quay County, NMNM8,454-3.3%+2.8 pts

27San Miguel County, NMNM26,260-3.5%−20.5 pts

28Curry County, NMNM46,655-3.7%−10.4 pts

29Socorro County, NMNM15,838-4.6%−27.0 pts

30Union County, NMNM3,844-5.8%−7.0 pts

31Hidalgo County, NMNM3,929-6.0%−5.5 pts

32Harding County, NMNM617-6.1%+11.8 pts

33McKinley County, NMNM68,119-6.6%−29.8 pts

SHOWING 1–33 OF 33

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU POPULATION ESTIMATES