RANKING · 2000 CENSUS · 33 SHOWN OF 33

Fastest growing, New Mexico counties · 2000

New Mexico counties ranked by population growth since the prior decennial census. 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 densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Torrance County, NMNM16,100+64.4%+0%

02Lincoln County, NMNM19,844+58.9%+0%

03Valencia County, NMNM82,013+46.2%+0%

04Sandoval County, NMNM159,565+42.0%+0%

05Catron County, NMNM3,827+38.2%+0%

06Luna County, NMNM25,407+38.1%+0%

07Sierra County, NMNM11,395+33.9%+0%

08Santa Fe County, NMNM156,907+30.7%+0%

09Taos County, NMNM34,564+29.7%+0%

10Doña Ana County, NMNM229,091+28.9%+0%

11San Juan County, NMNM120,340+24.2%+0%

12McKinley County, NMNM68,119+23.3%+0%

13Socorro County, NMNM15,838+22.4%+0%

14Mora County, NMNM4,051+21.5%+0%

15Otero County, NMNM70,368+20.0%+0%

16Rio Arriba County, NMNM39,832+19.9%+0%

17San Miguel County, NMNM26,260+17.0%+0%

18Bernalillo County, NMNM667,601+15.8%+0%

19Guadalupe County, NMNM4,343+12.6%+0%

20Grant County, NMNM27,252+12.0%+0%

21Colfax County, NMNM12,184+9.8%+0%

22Roosevelt County, NMNM18,615+7.9%+0%

23Cibola County, NMNM26,807+7.6%+0%

24Curry County, NMNM46,655+6.7%+0%

25Eddy County, NMNM62,509+6.3%+0%

26Chaves County, NMNM63,364+6.1%+0%

27Los Alamos County, NMNM19,407+1.3%+0%

28Union County, NMNM3,844+1.2%+0%

29Hidalgo County, NMNM3,929-0.4%+0%

30Lea County, NMNM74,749-0.5%+0%

31De Baca County, NMNM1,647-0.5%+0%

32Quay County, NMNM8,454-6.2%+0%

33Harding County, NMNM617-17.9%+0%

SHOWING 1–33 OF 33

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES