RANKING · 2025 ESTIMATES · 15 SHOWN OF 15

Most population lost, Arizona counties

Arizona counties that lost the most residents from the 2020 census to 2025, by raw count of people rather than percentage. This list covers the 15 counties in Arizona that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Apache County, AZAZ64,445-1,576−120%

02Coconino County, AZAZ144,368-733−104%

03Greenlee County, AZAZ9,312-251−147%

04La Paz County, AZAZ16,711+154−97%

05Gila County, AZAZ53,801+529−95%

06Cochise County, AZAZ126,332+885−96%

07Graham County, AZAZ40,157+1,624−77%

08Santa Cruz County, AZAZ50,020+2,351−73%

09Navajo County, AZAZ109,946+3,229−84%

10Mohave County, AZAZ228,102+14,835−76%

11Yavapai County, AZAZ252,552+16,343−73%

12Yuma County, AZAZ224,449+20,568−61%

13Pima County, AZAZ1,074,685+31,252−82%

14Pinal County, AZAZ539,380+114,116+80%

15Maricopa County, AZAZ4,689,558+268,990−72%

SHOWING 1–15 OF 15

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU POPULATION ESTIMATES