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%−27.6 pts

02Yuma County, AZAZ224,449+10.1%−39.6 pts

03Mohave County, AZAZ228,102+7.0%−58.9 pts

04Yavapai County, AZAZ252,552+6.9%−48.6 pts

05Maricopa County, AZAZ4,689,558+6.1%−38.7 pts

06Santa Cruz County, AZAZ50,020+4.9%−24.4 pts

07Graham County, AZAZ40,157+4.2%−21.9 pts

08Navajo County, AZAZ109,946+3.0%−22.5 pts

09Pima County, AZAZ1,074,685+3.0%−23.5 pts

10Gila County, AZAZ53,801+1.0%−26.7 pts

11La Paz County, AZAZ16,711+0.9%−41.5 pts

12Cochise County, AZAZ126,332+0.7%−19.9 pts

13Coconino County, AZAZ144,368-0.5%−20.9 pts

14Apache County, AZAZ64,445-2.4%−15.1 pts

15Greenlee County, AZAZ9,312-2.6%−9.4 pts

SHOWING 1–15 OF 15

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