RANKING · 2024 ACS · 33 SHOWN OF 33

Youngest by median age, New Mexico counties

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

01Curry County, NMNM46,65531.9+4%

02Roosevelt County, NMNM18,61532.3+9%

03Lea County, NMNM74,74932.5−2%

04Doña Ana County, NMNM229,09134.3+14%

05McKinley County, NMNM68,11934.6+29%

06De Baca County, NMNM1,64735.3−19%

07Eddy County, NMNM62,50936.2−1%

08Luna County, NMNM25,40736.3−1%

09Otero County, NMNM70,36836.4+8%

10Chaves County, NMNM63,36437.2+6%

11Guadalupe County, NMNM4,34337.8+1%

12San Juan County, NMNM120,34038.3+24%

13Los Alamos County, NMNM19,40739.3−4%

14Valencia County, NMNM82,01339.4+17%

15Bernalillo County, NMNM667,60139.5+13%

16Cibola County, NMNM26,80740.0+21%

17Socorro County, NMNM15,83840.3+24%

18Sandoval County, NMNM159,56541.3+18%

19Rio Arriba County, NMNM39,83242.0+22%

20Harding County, NMNM61742.5−13%

21Hidalgo County, NMNM3,92942.6+22%

22Union County, NMNM3,84442.6+7%

23Torrance County, NMNM16,10043.3+24%

24San Miguel County, NMNM26,26047.2+34%

25Santa Fe County, NMNM156,90748.7+28%

26Quay County, NMNM8,45448.9+18%

27Colfax County, NMNM12,18449.1+20%

28Grant County, NMNM27,25249.5+28%

29Lincoln County, NMNM19,84452.4+20%

30Taos County, NMNM34,56452.6+33%

31Mora County, NMNM4,05155.1+39%

32Sierra County, NMNM11,39557.6+18%

33Catron County, NMNM3,82763.8+33%

SHOWING 1–33 OF 33

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