RANKING · 2020 CENSUS · 15 SHOWN OF 15

Fastest shrinking, Arizona counties · 2020

Arizona counties with the steepest population decline from the 2010 census to 2020. This list covers the 15 counties in Arizona that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01La Paz County, AZAZ16,711-19.2%−145%

02Apache County, AZAZ64,445-7.7%−160%

03Cochise County, AZAZ126,332-4.5%−122%

04Navajo County, AZAZ109,946-0.7%−103%

05Gila County, AZAZ53,801-0.6%−102%

06Santa Cruz County, AZAZ50,020+0.5%−98%

07Graham County, AZAZ40,157+3.5%−86%

08Yuma County, AZAZ224,449+4.2%−92%

09Pima County, AZAZ1,074,685+6.4%−76%

10Mohave County, AZAZ228,102+6.5%−90%

11Coconino County, AZAZ144,368+7.9%−61%

12Yavapai County, AZAZ252,552+11.9%−79%

13Pinal County, AZAZ539,380+13.2%−76%

14Greenlee County, AZAZ9,312+13.3%+98%

15Maricopa County, AZAZ4,689,558+15.8%−65%

SHOWING 1–15 OF 15

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