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RANKING · 2020 CENSUS · 33 SHOWN OF 33

Oldest by median age, New Mexico counties · 2020

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 BYCitiesStatesMetrosZIP codes
RELATEDYoungest by median ageMost foreign-born residentsHighest uninsured rateMost womenMost menHighest disability rate
YEAR19902000201020202024
Oldest by median age by state
RANKPLACESTATEPOPMEDIAN AGEVS 2000
01Catron County, NMNM3,82761.9+29%
02Harding County, NMNM61758.4+20%
03Sierra County, NMNM11,39557.3+17%
04Mora County, NMNM4,05153.8+36%
05Lincoln County, NMNM19,84453.0+21%
06De Baca County, NMNM1,64751.5+18%
07Colfax County, NMNM12,18450.0+23%
08Taos County, NMNM34,56450.0+27%
09Grant County, NMNM27,25249.3+27%
10Santa Fe County, NMNM156,90747.9+26%
11Quay County, NMNM8,45447.5+14%
12Torrance County, NMNM16,10045.5+31%
13San Miguel County, NMNM26,26044.3+26%
14Union County, NMNM3,84443.6+9%
15Hidalgo County, NMNM3,92943.5+25%
16Rio Arriba County, NMNM39,83243.5+26%
17Guadalupe County, NMNM4,34342.0+12%
18Los Alamos County, NMNM19,40741.5+2%
19Sandoval County, NMNM159,56541.2+17%
20Luna County, NMNM25,40739.8+8%
21Valencia County, NMNM82,01339.8+18%
22Bernalillo County, NMNM667,60138.9+11%
23Socorro County, NMNM15,83838.6+19%
24Cibola County, NMNM26,80738.5+16%
25Otero County, NMNM70,36837.0+9%
26San Juan County, NMNM120,34036.5+18%
27Chaves County, NMNM63,36436.1+3%
28Doña Ana County, NMNM229,09136.0+19%
29Eddy County, NMNM62,50935.5−2%
30McKinley County, NMNM68,11934.4+28%
31Curry County, NMNM46,65532.8+6%
32Lea County, NMNM74,74932.3−2%
33Roosevelt County, NMNM18,61531.8+8%
SHOWING 1–33 OF 33
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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES