RANKING · 2024 ACS · 33 SHOWN OF 33

Oldest by median age, New Mexico counties

New Mexico counties ranked by median age of residents (2024 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

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Catron County, NMNM3,82763.8+33%

02Sierra County, NMNM11,39557.6+18%

03Mora County, NMNM4,05155.1+39%

04Taos County, NMNM34,56452.6+33%

05Lincoln County, NMNM19,84452.4+20%

06Grant County, NMNM27,25249.5+28%

07Colfax County, NMNM12,18449.1+20%

08Quay County, NMNM8,45448.9+18%

09Santa Fe County, NMNM156,90748.7+28%

10San Miguel County, NMNM26,26047.2+34%

11Torrance County, NMNM16,10043.3+24%

12Hidalgo County, NMNM3,92942.6+22%

13Union County, NMNM3,84442.6+7%

14Harding County, NMNM61742.5−13%

15Rio Arriba County, NMNM39,83242.0+22%

16Sandoval County, NMNM159,56541.3+18%

17Socorro County, NMNM15,83840.3+24%

18Cibola County, NMNM26,80740.0+21%

19Bernalillo County, NMNM667,60139.5+13%

20Valencia County, NMNM82,01339.4+17%

21Los Alamos County, NMNM19,40739.3−4%

22San Juan County, NMNM120,34038.3+24%

23Guadalupe County, NMNM4,34337.8+1%

24Chaves County, NMNM63,36437.2+6%

25Otero County, NMNM70,36836.4+8%

26Luna County, NMNM25,40736.3−1%

27Eddy County, NMNM62,50936.2−1%

28De Baca County, NMNM1,64735.3−19%

29McKinley County, NMNM68,11934.6+29%

30Doña Ana County, NMNM229,09134.3+14%

31Lea County, NMNM74,74932.5−2%

32Roosevelt County, NMNM18,61532.3+9%

33Curry County, NMNM46,65531.9+4%

SHOWING 1–33 OF 33

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES