RANKING · 2000 CENSUS · 33 SHOWN OF 33

Youngest by median age, New Mexico counties · 2000

New Mexico counties with the youngest median age (2000 ACS). This list covers the 33 counties in New Mexico that qualify, ranked against each other statewide. The median across all 33 is 35.2.

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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 1990

01McKinley County, NMNM68,11926.9+5%

02Roosevelt County, NMNM18,61529.5−1%

03Doña Ana County, NMNM229,09130.2+7%

04Curry County, NMNM46,65530.8+5%

05San Juan County, NMNM120,34031.0+9%

06Socorro County, NMNM15,83832.4+8%

07Cibola County, NMNM26,80733.1+10%

08Lea County, NMNM74,74933.1+9%

09Otero County, NMNM70,36833.8+16%

10Valencia County, NMNM82,01333.8+7%

11Rio Arriba County, NMNM39,83234.5+15%

12Hidalgo County, NMNM3,92934.8+15%

13Torrance County, NMNM16,10034.8+7%

14Bernalillo County, NMNM667,60135.0+8%

15San Miguel County, NMNM26,26035.1+15%

16Sandoval County, NMNM159,56535.1+14%

17Chaves County, NMNM63,36435.2+11%

18Eddy County, NMNM62,50936.4+9%

19Luna County, NMNM25,40736.7+1%

20Guadalupe County, NMNM4,34337.5+15%

21Santa Fe County, NMNM156,90737.9+10%

22Grant County, NMNM27,25238.8+17%

23Taos County, NMNM34,56439.5+16%

24Mora County, NMNM4,05139.6+15%

25Union County, NMNM3,84439.9+8%

26Colfax County, NMNM12,18440.8+15%

27Los Alamos County, NMNM19,40740.8+8%

28Quay County, NMNM8,45441.5+14%

29De Baca County, NMNM1,64743.8+6%

30Lincoln County, NMNM19,84443.8+17%

31Catron County, NMNM3,82747.8+27%

32Harding County, NMNM61748.7+28%

33Sierra County, NMNM11,39548.9−5%

SHOWING 1–33 OF 33

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS