RANKING · 2010 CENSUS · 33 SHOWN OF 33

Fastest growing, New Mexico counties · 2010

New Mexico counties ranked by population growth from the 2000 census to 2010. 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

01Sandoval County, NMNM159,565+46.3%+4.3 pts

02Doña Ana County, NMNM229,091+19.8%−9.1 pts

03Bernalillo County, NMNM667,601+19.0%+3.2 pts

04Lea County, NMNM74,749+16.6%+17.1 pts

05Valencia County, NMNM82,013+15.7%−30.5 pts

06San Juan County, NMNM120,340+14.3%−10.0 pts

07Santa Fe County, NMNM156,907+11.5%−19.2 pts

08Roosevelt County, NMNM18,615+10.1%+2.3 pts

09Taos County, NMNM34,564+9.9%−19.8 pts

10Union County, NMNM3,844+9.0%+7.8 pts

11Curry County, NMNM46,655+7.4%+0.7 pts

12Chaves County, NMNM63,364+6.9%+0.8 pts

13Cibola County, NMNM26,807+6.3%−1.2 pts

14Lincoln County, NMNM19,844+5.6%−53.3 pts

15Catron County, NMNM3,827+5.1%−33.1 pts

16Eddy County, NMNM62,509+4.2%−2.1 pts

17Otero County, NMNM70,368+2.4%−17.6 pts

18Luna County, NMNM25,407+0.3%−37.8 pts

19Guadalupe County, NMNM4,343+0.1%−12.5 pts

20Socorro County, NMNM15,838-1.2%−23.6 pts

21Los Alamos County, NMNM19,407-2.1%−3.4 pts

22Rio Arriba County, NMNM39,832-2.3%−22.2 pts

23San Miguel County, NMNM26,260-2.4%−19.5 pts

24Colfax County, NMNM12,184-3.1%−12.9 pts

25Torrance County, NMNM16,100-3.1%−67.5 pts

26McKinley County, NMNM68,119-4.4%−27.7 pts

27Grant County, NMNM27,252-4.8%−16.8 pts

28Mora County, NMNM4,051-5.8%−27.3 pts

29Sierra County, NMNM11,395-9.7%−43.5 pts

30De Baca County, NMNM1,647-9.7%−9.2 pts

31Quay County, NMNM8,454-11.0%−4.8 pts

32Harding County, NMNM617-14.2%+3.7 pts

33Hidalgo County, NMNM3,929-17.5%−17.1 pts

SHOWING 1–33 OF 33

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS