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.

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

01Maricopa County, AZAZ4,689,558+15.8%−29.0 pts

02Greenlee County, AZAZ9,312+13.3%+6.6 pts

03Pinal County, AZAZ539,380+13.2%−41.3 pts

04Yavapai County, AZAZ252,552+11.9%−43.6 pts

05Coconino County, AZAZ144,368+7.9%−12.5 pts

06Mohave County, AZAZ228,102+6.5%−59.3 pts

07Pima County, AZAZ1,074,685+6.4%−20.1 pts

08Yuma County, AZAZ224,449+4.2%−45.6 pts

09Graham County, AZAZ40,157+3.5%−22.6 pts

10Santa Cruz County, AZAZ50,020+0.5%−28.8 pts

11Gila County, AZAZ53,801-0.6%−28.3 pts

12Navajo County, AZAZ109,946-0.7%−26.2 pts

13Cochise County, AZAZ126,332-4.5%−25.1 pts

14Apache County, AZAZ64,445-7.7%−20.4 pts

15La Paz County, AZAZ16,711-19.2%−61.6 pts

SHOWING 1–15 OF 15

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS