RANKING · 2020 CENSUS · 33 SHOWN OF 33

Oldest by median age, New Mexico counties · 2020

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

01Catron County, NMNM3,82761.9+29%

02Harding County, NMNM61758.4+20%

03Sierra County, NMNM11,39557.3+17%

04Mora County, NMNM4,05153.8+36%

05Lincoln County, NMNM19,84453.0+21%

06De Baca County, NMNM1,64751.5+18%

07Colfax County, NMNM12,18450.0+23%

08Taos County, NMNM34,56450.0+27%

09Grant County, NMNM27,25249.3+27%

10Santa Fe County, NMNM156,90747.9+26%

11Quay County, NMNM8,45447.5+14%

12Torrance County, NMNM16,10045.5+31%

13San Miguel County, NMNM26,26044.3+26%

14Union County, NMNM3,84443.6+9%

15Hidalgo County, NMNM3,92943.5+25%

16Rio Arriba County, NMNM39,83243.5+26%

17Guadalupe County, NMNM4,34342.0+12%

18Los Alamos County, NMNM19,40741.5+2%

19Sandoval County, NMNM159,56541.2+17%

20Luna County, NMNM25,40739.8+8%

21Valencia County, NMNM82,01339.8+18%

22Bernalillo County, NMNM667,60138.9+11%

23Socorro County, NMNM15,83838.6+19%

24Cibola County, NMNM26,80738.5+16%

25Otero County, NMNM70,36837.0+9%

26San Juan County, NMNM120,34036.5+18%

27Chaves County, NMNM63,36436.1+3%

28Doña Ana County, NMNM229,09136.0+19%

29Eddy County, NMNM62,50935.5−2%

30McKinley County, NMNM68,11934.4+28%

31Curry County, NMNM46,65532.8+6%

32Lea County, NMNM74,74932.3−2%

33Roosevelt County, NMNM18,61531.8+8%

SHOWING 1–33 OF 33

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