RANKING · 2000 CENSUS · 33 SHOWN OF 33

Fastest shrinking, New Mexico counties · 2000

New Mexico counties with the steepest population decline from the 1990 census to 2000. 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 –

01Harding County, NMNM617-17.9%–

02Quay County, NMNM8,454-6.2%–

03De Baca County, NMNM1,647-0.5%–

04Lea County, NMNM74,749-0.5%–

05Hidalgo County, NMNM3,929-0.4%–

06Union County, NMNM3,844+1.2%–

07Los Alamos County, NMNM19,407+1.3%–

08Chaves County, NMNM63,364+6.1%–

09Eddy County, NMNM62,509+6.3%–

10Curry County, NMNM46,655+6.7%–

11Cibola County, NMNM26,807+7.6%–

12Roosevelt County, NMNM18,615+7.9%–

13Colfax County, NMNM12,184+9.8%–

14Grant County, NMNM27,252+12.0%–

15Guadalupe County, NMNM4,343+12.6%–

16Bernalillo County, NMNM667,601+15.8%–

17San Miguel County, NMNM26,260+17.0%–

18Rio Arriba County, NMNM39,832+19.9%–

19Otero County, NMNM70,368+20.0%–

20Mora County, NMNM4,051+21.5%–

21Socorro County, NMNM15,838+22.4%–

22McKinley County, NMNM68,119+23.3%–

23San Juan County, NMNM120,340+24.2%–

24Doña Ana County, NMNM229,091+28.9%–

25Taos County, NMNM34,564+29.7%–

26Santa Fe County, NMNM156,907+30.7%–

27Sierra County, NMNM11,395+33.9%–

28Luna County, NMNM25,407+38.1%–

29Catron County, NMNM3,827+38.2%–

30Sandoval County, NMNM159,565+42.0%–

31Valencia County, NMNM82,013+46.2%–

32Lincoln County, NMNM19,844+58.9%–

33Torrance County, NMNM16,100+64.4%–

SHOWING 1–33 OF 33

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