RANKING · 2010 CENSUS · 33 SHOWN OF 33

Youngest by median age, New Mexico counties · 2010

New Mexico counties with the youngest median age (2010 ACS). This list covers the 33 counties in New Mexico that qualify, ranked against each other statewide. The median across all 33 is 40.1.

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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

01Roosevelt County, NMNM18,61529.7+1%

02McKinley County, NMNM68,11930.7+14%

03Curry County, NMNM46,65531.5+2%

04Lea County, NMNM74,74931.9−4%

05Doña Ana County, NMNM229,09132.4+7%

06San Juan County, NMNM120,34033.0+6%

07Chaves County, NMNM63,36434.7−1%

08Bernalillo County, NMNM667,60135.8+2%

09Otero County, NMNM70,36836.5+8%

10Cibola County, NMNM26,80736.6+11%

11Socorro County, NMNM15,83836.9+14%

12Eddy County, NMNM62,50937.3+2%

13Valencia County, NMNM82,01337.7+12%

14Sandoval County, NMNM159,56537.9+8%

15Rio Arriba County, NMNM39,83239.0+13%

16Luna County, NMNM25,40739.5+8%

17Guadalupe County, NMNM4,34340.1+7%

18San Miguel County, NMNM26,26040.7+16%

19Hidalgo County, NMNM3,92940.9+18%

20Union County, NMNM3,84440.9+3%

21Torrance County, NMNM16,10041.6+20%

22Santa Fe County, NMNM156,90743.0+13%

23Los Alamos County, NMNM19,40744.3+9%

24Taos County, NMNM34,56445.2+14%

25Quay County, NMNM8,45445.6+10%

26Grant County, NMNM27,25245.9+18%

27Mora County, NMNM4,05146.0+16%

28Colfax County, NMNM12,18446.7+14%

29De Baca County, NMNM1,64747.8+9%

30Lincoln County, NMNM19,84449.4+13%

31Sierra County, NMNM11,39554.5+11%

32Catron County, NMNM3,82755.8+17%

33Harding County, NMNM61755.9+15%

SHOWING 1–33 OF 33

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