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.

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