RANKING · 2020 CENSUS · 15 SHOWN OF 15

Most population lost, Arizona counties · 2020

Arizona counties that lost the most residents from the 2010 census to 2020, 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

01Cochise County, AZAZ126,332-5,899−129%

02Apache County, AZAZ64,445-5,497−170%

03La Paz County, AZAZ16,711-3,932−167%

04Navajo County, AZAZ109,946-732−104%

05Gila County, AZAZ53,801-325−103%

06Santa Cruz County, AZAZ50,020+249−97%

07Greenlee County, AZAZ9,312+1,126+109%

08Graham County, AZAZ40,157+1,313−81%

09Yuma County, AZAZ224,449+8,130−85%

10Coconino County, AZAZ144,368+10,680−46%

11Mohave County, AZAZ228,102+13,081−79%

12Yavapai County, AZAZ252,552+25,176−58%

13Pinal County, AZAZ539,380+49,494−22%

14Pima County, AZAZ1,074,685+63,170−64%

15Maricopa County, AZAZ4,689,558+603,451−36%

SHOWING 1–15 OF 15

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