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.

Flip the list · Fastest growing, US counties →

New MexicoAll states All rankings

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%+3910%

02Harding County, NMNM617-14.2%−21%

03Quay County, NMNM8,454-11.0%+78%

04De Baca County, NMNM1,647-9.7%+1726%

05Sierra County, NMNM11,395-9.7%−129%

06Mora County, NMNM4,051-5.8%−127%

07Grant County, NMNM27,252-4.8%−140%

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

09Torrance County, NMNM16,100-3.1%−105%

10Colfax County, NMNM12,184-3.1%−132%

11San Miguel County, NMNM26,260-2.4%−114%

12Rio Arriba County, NMNM39,832-2.3%−112%

13Los Alamos County, NMNM19,407-2.1%−270%

14Socorro County, NMNM15,838-1.2%−105%

15Guadalupe County, NMNM4,343+0.1%−99%

16Luna County, NMNM25,407+0.3%−99%

17Otero County, NMNM70,368+2.4%−88%

18Eddy County, NMNM62,509+4.2%−33%

19Catron County, NMNM3,827+5.1%−87%

20Lincoln County, NMNM19,844+5.6%−90%

21Cibola County, NMNM26,807+6.3%−16%

22Chaves County, NMNM63,364+6.9%+14%

23Curry County, NMNM46,655+7.4%+10%

24Union County, NMNM3,844+9.0%+641%

25Taos County, NMNM34,564+9.9%−67%

26Roosevelt County, NMNM18,615+10.1%+29%

27Santa Fe County, NMNM156,907+11.5%−63%

28San Juan County, NMNM120,340+14.3%−41%

29Valencia County, NMNM82,013+15.7%−66%

30Lea County, NMNM74,749+16.6%−3745%

31Bernalillo County, NMNM667,601+19.0%+20%

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

33Sandoval County, NMNM159,565+46.3%+10%

SHOWING 1–33 OF 33

Download CSV (full list, 33 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS