RANKING · 2000 CENSUS · 33 SHOWN OF 33

Most population lost, New Mexico counties · 2000

New Mexico counties that lost the most residents from the 1990 census to 2000, by raw count of people rather than percentage. This list covers the 33 counties in New Mexico that qualify, ranked against each other statewide. The median across all 33 is +3,326.

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SAME RANKING BYCities States Metros

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

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS –

01Quay County, NMNM8,454-668–

02Lea County, NMNM74,749-254–

03Harding County, NMNM617-177–

04Hidalgo County, NMNM3,929-26–

05De Baca County, NMNM1,647-12–

06Union County, NMNM3,844+50–

07Los Alamos County, NMNM19,407+228–

08Guadalupe County, NMNM4,343+524–

09Mora County, NMNM4,051+916–

10Catron County, NMNM3,827+980–

11Colfax County, NMNM12,184+1,264–

12Roosevelt County, NMNM18,615+1,316–

13Cibola County, NMNM26,807+1,801–

14Curry County, NMNM46,655+2,837–

15Eddy County, NMNM62,509+3,053–

16Socorro County, NMNM15,838+3,314–

17Grant County, NMNM27,252+3,326–

18Sierra County, NMNM11,395+3,358–

19Chaves County, NMNM63,364+3,533–

20San Miguel County, NMNM26,260+4,383–

21Torrance County, NMNM16,100+6,626–

22Rio Arriba County, NMNM39,832+6,825–

23Taos County, NMNM34,564+6,861–

24Luna County, NMNM25,407+6,906–

25Lincoln County, NMNM19,844+7,192–

26Otero County, NMNM70,368+10,370–

27McKinley County, NMNM68,119+14,112–

28Valencia County, NMNM82,013+20,917–

29San Juan County, NMNM120,340+22,196–

30Sandoval County, NMNM159,565+26,589–

31Santa Fe County, NMNM156,907+30,364–

32Doña Ana County, NMNM229,091+39,172–

33Bernalillo County, NMNM667,601+76,101–

SHOWING 1–33 OF 33

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS