RANKING · 2020 CENSUS · 33 SHOWN OF 33

Youngest by median age, New Mexico counties · 2020

New Mexico counties with the youngest median age (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

RELATEDOldest 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

01Roosevelt County, NMNM18,61531.8+8%

02Lea County, NMNM74,74932.3−2%

03Curry County, NMNM46,65532.8+6%

04McKinley County, NMNM68,11934.4+28%

05Eddy County, NMNM62,50935.5−2%

06Doña Ana County, NMNM229,09136.0+19%

07Chaves County, NMNM63,36436.1+3%

08San Juan County, NMNM120,34036.5+18%

09Otero County, NMNM70,36837.0+9%

10Cibola County, NMNM26,80738.5+16%

11Socorro County, NMNM15,83838.6+19%

12Bernalillo County, NMNM667,60138.9+11%

13Luna County, NMNM25,40739.8+8%

14Valencia County, NMNM82,01339.8+18%

15Sandoval County, NMNM159,56541.2+17%

16Los Alamos County, NMNM19,40741.5+2%

17Guadalupe County, NMNM4,34342.0+12%

18Hidalgo County, NMNM3,92943.5+25%

19Rio Arriba County, NMNM39,83243.5+26%

20Union County, NMNM3,84443.6+9%

21San Miguel County, NMNM26,26044.3+26%

22Torrance County, NMNM16,10045.5+31%

23Quay County, NMNM8,45447.5+14%

24Santa Fe County, NMNM156,90747.9+26%

25Grant County, NMNM27,25249.3+27%

26Colfax County, NMNM12,18450.0+23%

27Taos County, NMNM34,56450.0+27%

28De Baca County, NMNM1,64751.5+18%

29Lincoln County, NMNM19,84453.0+21%

30Mora County, NMNM4,05153.8+36%

31Sierra County, NMNM11,39557.3+17%

32Harding County, NMNM61758.4+20%

33Catron County, NMNM3,82761.9+29%

SHOWING 1–33 OF 33

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