RANKING · 2025 ESTIMATES · 15 SHOWN OF 15

Fastest growing, Arizona counties

Arizona counties ranked by population growth from the 2020 census to 2025. This list covers the 15 counties in Arizona that qualify, ranked against each other statewide.

Flip the list · Fastest shrinking, US counties →

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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

01Pinal County, AZAZ539,380+26.8%−51%

02Yuma County, AZAZ224,449+10.1%−80%

03Mohave County, AZAZ228,102+7.0%−89%

04Yavapai County, AZAZ252,552+6.9%−88%

05Maricopa County, AZAZ4,689,558+6.1%−86%

06Santa Cruz County, AZAZ50,020+4.9%−83%

07Graham County, AZAZ40,157+4.2%−84%

08Navajo County, AZAZ109,946+3.0%−88%

09Pima County, AZAZ1,074,685+3.0%−89%

10Gila County, AZAZ53,801+1.0%−96%

11La Paz County, AZAZ16,711+0.9%−98%

12Cochise County, AZAZ126,332+0.7%−97%

13Coconino County, AZAZ144,368-0.5%−102%

14Apache County, AZAZ64,445-2.4%−119%

15Greenlee County, AZAZ9,312-2.6%−139%

SHOWING 1–15 OF 15

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES