RANKING · 2000 CENSUS · 33 SHOWN OF 33

Youngest by median age, New Mexico counties · 2000

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

01McKinley County, NMNM68,11926.9+0%

02Roosevelt County, NMNM18,61529.5+0%

03Doña Ana County, NMNM229,09130.2+0%

04Curry County, NMNM46,65530.8+0%

05San Juan County, NMNM120,34031.0+0%

06Socorro County, NMNM15,83832.4+0%

07Cibola County, NMNM26,80733.1+0%

08Lea County, NMNM74,74933.1+0%

09Otero County, NMNM70,36833.8+0%

10Valencia County, NMNM82,01333.8+0%

11Rio Arriba County, NMNM39,83234.5+0%

12Hidalgo County, NMNM3,92934.8+0%

13Torrance County, NMNM16,10034.8+0%

14Bernalillo County, NMNM667,60135.0+0%

15San Miguel County, NMNM26,26035.1+0%

16Sandoval County, NMNM159,56535.1+0%

17Chaves County, NMNM63,36435.2+0%

18Eddy County, NMNM62,50936.4+0%

19Luna County, NMNM25,40736.7+0%

20Guadalupe County, NMNM4,34337.5+0%

21Santa Fe County, NMNM156,90737.9+0%

22Grant County, NMNM27,25238.8+0%

23Taos County, NMNM34,56439.5+0%

24Mora County, NMNM4,05139.6+0%

25Union County, NMNM3,84439.9+0%

26Colfax County, NMNM12,18440.8+0%

27Los Alamos County, NMNM19,40740.8+0%

28Quay County, NMNM8,45441.5+0%

29De Baca County, NMNM1,64743.8+0%

30Lincoln County, NMNM19,84443.8+0%

31Catron County, NMNM3,82747.8+0%

32Harding County, NMNM61748.7+0%

33Sierra County, NMNM11,39548.9+0%

SHOWING 1–33 OF 33

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