RANKING · 2000 CENSUS · 33 SHOWN OF 33

Oldest by median age, New Mexico counties · 2000

New Mexico counties ranked by median age of residents (2023 ACS). 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 ZIP codes

RELATEDYoungest by median age Most foreign-born residents Highest uninsured rate Most women Most men Highest disability rate

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Sierra County, NMNM11,39548.9+0%

02Harding County, NMNM61748.7+0%

03Catron County, NMNM3,82747.8+0%

04De Baca County, NMNM1,64743.8+0%

05Lincoln County, NMNM19,84443.8+0%

06Quay County, NMNM8,45441.5+0%

07Colfax County, NMNM12,18440.8+0%

08Los Alamos County, NMNM19,40740.8+0%

09Union County, NMNM3,84439.9+0%

10Mora County, NMNM4,05139.6+0%

11Taos County, NMNM34,56439.5+0%

12Grant County, NMNM27,25238.8+0%

13Santa Fe County, NMNM156,90737.9+0%

14Guadalupe County, NMNM4,34337.5+0%

15Luna County, NMNM25,40736.7+0%

16Eddy County, NMNM62,50936.4+0%

17Chaves County, NMNM63,36435.2+0%

18San Miguel County, NMNM26,26035.1+0%

19Sandoval County, NMNM159,56535.1+0%

20Bernalillo County, NMNM667,60135.0+0%

21Hidalgo County, NMNM3,92934.8+0%

22Torrance County, NMNM16,10034.8+0%

23Rio Arriba County, NMNM39,83234.5+0%

24Otero County, NMNM70,36833.8+0%

25Valencia County, NMNM82,01333.8+0%

26Cibola County, NMNM26,80733.1+0%

27Lea County, NMNM74,74933.1+0%

28Socorro County, NMNM15,83832.4+0%

29San Juan County, NMNM120,34031.0+0%

30Curry County, NMNM46,65530.8+0%

31Doña Ana County, NMNM229,09130.2+0%

32Roosevelt County, NMNM18,61529.5+0%

33McKinley County, NMNM68,11926.9+0%

SHOWING 1–33 OF 33

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