RANKING · 2010 CENSUS · 33 SHOWN OF 33

Fastest shrinking, New Mexico counties · 2010

New Mexico counties with the steepest population decline 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 growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Hidalgo County, NMNM3,929-17.5%−17.1 pts

02Harding County, NMNM617-14.2%+3.7 pts

03Quay County, NMNM8,454-11.0%−4.8 pts

04De Baca County, NMNM1,647-9.7%−9.2 pts

05Sierra County, NMNM11,395-9.7%−43.5 pts

06Mora County, NMNM4,051-5.8%−27.3 pts

07Grant County, NMNM27,252-4.8%−16.8 pts

08McKinley County, NMNM68,119-4.4%−27.7 pts

09Torrance County, NMNM16,100-3.1%−67.5 pts

10Colfax County, NMNM12,184-3.1%−12.9 pts

11San Miguel County, NMNM26,260-2.4%−19.5 pts

12Rio Arriba County, NMNM39,832-2.3%−22.2 pts

13Los Alamos County, NMNM19,407-2.1%−3.4 pts

14Socorro County, NMNM15,838-1.2%−23.6 pts

15Guadalupe County, NMNM4,343+0.1%−12.5 pts

16Luna County, NMNM25,407+0.3%−37.8 pts

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

18Eddy County, NMNM62,509+4.2%−2.1 pts

19Catron County, NMNM3,827+5.1%−33.1 pts

20Lincoln County, NMNM19,844+5.6%−53.3 pts

21Cibola County, NMNM26,807+6.3%−1.2 pts

22Chaves County, NMNM63,364+6.9%+0.8 pts

23Curry County, NMNM46,655+7.4%+0.7 pts

24Union County, NMNM3,844+9.0%+7.8 pts

25Taos County, NMNM34,564+9.9%−19.8 pts

26Roosevelt County, NMNM18,615+10.1%+2.3 pts

27Santa Fe County, NMNM156,907+11.5%−19.2 pts

28San Juan County, NMNM120,340+14.3%−10.0 pts

29Valencia County, NMNM82,013+15.7%−30.5 pts

30Lea County, NMNM74,749+16.6%+17.1 pts

31Bernalillo County, NMNM667,601+19.0%+3.2 pts

32Doña Ana County, NMNM229,091+19.8%−9.1 pts

33Sandoval County, NMNM159,565+46.3%+4.3 pts

SHOWING 1–33 OF 33

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