RANKING · 2020 CENSUS · 15 SHOWN OF 15

Fastest growing, Arizona counties · 2020

Arizona counties ranked by population growth 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 shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Maricopa County, AZAZ4,689,558+15.8%−65%

02Greenlee County, AZAZ9,312+13.3%+98%

03Pinal County, AZAZ539,380+13.2%−76%

04Yavapai County, AZAZ252,552+11.9%−79%

05Coconino County, AZAZ144,368+7.9%−61%

06Mohave County, AZAZ228,102+6.5%−90%

07Pima County, AZAZ1,074,685+6.4%−76%

08Yuma County, AZAZ224,449+4.2%−92%

09Graham County, AZAZ40,157+3.5%−86%

10Santa Cruz County, AZAZ50,020+0.5%−98%

11Gila County, AZAZ53,801-0.6%−102%

12Navajo County, AZAZ109,946-0.7%−103%

13Cochise County, AZAZ126,332-4.5%−122%

14Apache County, AZAZ64,445-7.7%−160%

15La Paz County, AZAZ16,711-19.2%−145%

SHOWING 1–15 OF 15

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