RANKING · 1990 CENSUS · 33 SHOWN OF 33

Youngest by median age, New Mexico counties · 1990

New Mexico counties with the youngest median age (1990 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 –

01McKinley County, NMNM68,11925.5–

02Doña Ana County, NMNM229,09128.2–

03San Juan County, NMNM120,34028.3–

04Otero County, NMNM70,36829.2–

05Curry County, NMNM46,65529.3–

06Roosevelt County, NMNM18,61529.8–

07Cibola County, NMNM26,80730.0–

08Socorro County, NMNM15,83830.1–

09Rio Arriba County, NMNM39,83230.1–

10Hidalgo County, NMNM3,92930.3–

11Lea County, NMNM74,74930.5–

12San Miguel County, NMNM26,26030.6–

13Sandoval County, NMNM159,56530.8–

14Valencia County, NMNM82,01331.6–

15Chaves County, NMNM63,36431.8–

16Bernalillo County, NMNM667,60132.4–

17Guadalupe County, NMNM4,34332.5–

18Torrance County, NMNM16,10032.7–

19Grant County, NMNM27,25233.1–

20Eddy County, NMNM62,50933.4–

21Taos County, NMNM34,56434.1–

22Mora County, NMNM4,05134.4–

23Santa Fe County, NMNM156,90734.6–

24Colfax County, NMNM12,18435.5–

25Luna County, NMNM25,40736.4–

26Quay County, NMNM8,45436.5–

27Union County, NMNM3,84437.1–

28Lincoln County, NMNM19,84437.4–

29Catron County, NMNM3,82737.7–

30Los Alamos County, NMNM19,40737.8–

31Harding County, NMNM61738.1–

32De Baca County, NMNM1,64741.4–

33Sierra County, NMNM11,39551.3–

SHOWING 1–33 OF 33

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS