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RANKING · 2025 ESTIMATES · 33 SHOWN OF 33

Fastest shrinking, New Mexico counties

New Mexico counties with the steepest population decline from the 2020 census to 2025. This list covers the 33 counties in New Mexico that qualify, ranked against each other statewide. The median across all 33 is -1.6%. Biggest climber in the top 100 since 2020: McKinley County, NM, up 23 places to #1.

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SAME RANKING BYCitiesStatesMetros
Fastest shrinking by state
All USAlaskaAlabamaArkansasArizonaCaliforniaColoradoFloridaGeorgiaIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyoming
RANKPLACESTATEPOPPOPULATION GROWTHVS 2000
01▲23McKinley County, NMNM68,119-6.6%−29.8 pts
02▲8Harding County, NMNM617-6.1%+11.8 pts
03▼1Hidalgo County, NMNM3,929-6.0%−5.5 pts
04Union County, NMNM3,844-5.8%−7.0 pts
05▲3Socorro County, NMNM15,838-4.6%−27.0 pts
06▲15Curry County, NMNM46,655-3.7%−10.4 pts
07San Miguel County, NMNM26,260-3.5%−20.5 pts
08▲8Quay County, NMNM8,454-3.3%+2.8 pts
09▲3Grant County, NMNM27,252-3.3%−15.3 pts
10▼7Mora County, NMNM4,051-3.3%−24.8 pts
11▼10De Baca County, NMNM1,647-3.0%−2.5 pts
12▲3Roosevelt County, NMNM18,615-3.0%−10.9 pts
13▲5Chaves County, NMNM63,364-2.8%−8.9 pts
14▼3Guadalupe County, NMNM4,343-2.4%−15.1 pts
15▲2Lincoln County, NMNM19,844-2.1%−61.0 pts
16▼11Colfax County, NMNM12,184-1.6%−11.4 pts
17▼3Sierra County, NMNM11,395-1.6%−35.4 pts
18▲2Cibola County, NMNM26,807-1.3%−8.9 pts
19▲3Rio Arriba County, NMNM39,832-1.3%−21.2 pts
20▲5Bernalillo County, NMNM667,601-1.3%−17.1 pts
21▼12San Juan County, NMNM120,340-1.1%−25.3 pts
22▲1Luna County, NMNM25,407-0.1%−38.2 pts
23▲7Los Alamos County, NMNM19,407-0.1%−1.3 pts
24▲2Taos County, NMNM34,564+0.2%−29.5 pts
25▲8Eddy County, NMNM62,509+0.3%−6.0 pts
26▲6Lea County, NMNM74,749+0.4%+0.9 pts
27▲2Santa Fe County, NMNM156,907+1.3%−29.3 pts
28Otero County, NMNM70,368+3.7%−16.2 pts
29▼2Doña Ana County, NMNM229,091+4.3%−24.6 pts
30▼17Catron County, NMNM3,827+6.9%−31.3 pts
31▼25Torrance County, NMNM16,100+7.0%−57.4 pts
32▼1Sandoval County, NMNM159,565+7.2%−34.8 pts
33▼14Valencia County, NMNM82,013+7.6%−38.6 pts
SHOWING 1–33 OF 33

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES