RANKING · 2010 CENSUS · 33 SHOWN OF 33

Oldest by median age, New Mexico counties · 2010

New Mexico counties ranked by median age of residents (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

RELATEDYoungest 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

01Harding County, NMNM61755.9+15%

02Catron County, NMNM3,82755.8+17%

03Sierra County, NMNM11,39554.5+11%

04Lincoln County, NMNM19,84449.4+13%

05De Baca County, NMNM1,64747.8+9%

06Colfax County, NMNM12,18446.7+14%

07Mora County, NMNM4,05146.0+16%

08Grant County, NMNM27,25245.9+18%

09Quay County, NMNM8,45445.6+10%

10Taos County, NMNM34,56445.2+14%

11Los Alamos County, NMNM19,40744.3+9%

12Santa Fe County, NMNM156,90743.0+13%

13Torrance County, NMNM16,10041.6+20%

14Hidalgo County, NMNM3,92940.9+18%

15Union County, NMNM3,84440.9+3%

16San Miguel County, NMNM26,26040.7+16%

17Guadalupe County, NMNM4,34340.1+7%

18Luna County, NMNM25,40739.5+8%

19Rio Arriba County, NMNM39,83239.0+13%

20Sandoval County, NMNM159,56537.9+8%

21Valencia County, NMNM82,01337.7+12%

22Eddy County, NMNM62,50937.3+2%

23Socorro County, NMNM15,83836.9+14%

24Cibola County, NMNM26,80736.6+11%

25Otero County, NMNM70,36836.5+8%

26Bernalillo County, NMNM667,60135.8+2%

27Chaves County, NMNM63,36434.7−1%

28San Juan County, NMNM120,34033.0+6%

29Doña Ana County, NMNM229,09132.4+7%

30Lea County, NMNM74,74931.9−4%

31Curry County, NMNM46,65531.5+2%

32McKinley County, NMNM68,11930.7+14%

33Roosevelt County, NMNM18,61529.7+1%

SHOWING 1–33 OF 33

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