RANKING · 2000 CENSUS · 33 SHOWN OF 33

Most densely populated, New Mexico counties · 2000

New Mexico counties ranked by residents per square mile (2023). 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 Fastest shrinking Most sparsely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Bernalillo County, NMNM667,601479+0%

02Los Alamos County, NMNM19,407168+0%

03Santa Fe County, NMNM156,90768+0%

04Valencia County, NMNM82,01362+0%

05Doña Ana County, NMNM229,09146+0%

06Curry County, NMNM46,65532+0%

07Sandoval County, NMNM159,56524+0%

08San Juan County, NMNM120,34021+0%

09McKinley County, NMNM68,11914+0%

10Taos County, NMNM34,56414+0%

11Lea County, NMNM74,74913+0%

12Eddy County, NMNM62,50912+0%

13Chaves County, NMNM63,36410+0%

14Otero County, NMNM70,3689+0%

15Luna County, NMNM25,4078+0%

16Grant County, NMNM27,2528+0%

17Roosevelt County, NMNM18,6157+0%

18Rio Arriba County, NMNM39,8327+0%

19San Miguel County, NMNM26,2606+0%

20Cibola County, NMNM26,8076+0%

21Torrance County, NMNM16,1005+0%

22Lincoln County, NMNM19,8444+0%

23Colfax County, NMNM12,1844+0%

24Quay County, NMNM8,4544+0%

25Sierra County, NMNM11,3953+0%

26Socorro County, NMNM15,8383+0%

27Mora County, NMNM4,0513+0%

28Hidalgo County, NMNM3,9292+0%

29Guadalupe County, NMNM4,3432+0%

30Union County, NMNM3,8441+0%

31De Baca County, NMNM1,6471+0%

32Catron County, NMNM3,8271+0%

33Harding County, NMNM6170+0%

SHOWING 1–33 OF 33

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