RANKING · 2025 ACS · 15 SHOWN OF 15

Most sparsely populated, Arizona counties

Arizona counties with the fewest residents per square mile (2023). 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 growing Fastest shrinking Most densely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01La Paz County, AZAZ16,7114−15%

02Greenlee County, AZAZ9,3125+9%

03Apache County, AZAZ64,4456−7%

04Coconino County, AZAZ144,3688+24%

05Graham County, AZAZ40,1579+20%

06Navajo County, AZAZ109,94611+13%

07Gila County, AZAZ53,80111+5%

08Mohave County, AZAZ228,10217+47%

09Cochise County, AZAZ126,33220+7%

10Yavapai County, AZAZ252,55231+51%

11Santa Cruz County, AZAZ50,02040+30%

12Yuma County, AZAZ224,44941+40%

13Pinal County, AZAZ539,380101+200%

14Pima County, AZAZ1,074,685117+27%

15Maricopa County, AZAZ4,689,558510+53%

SHOWING 1–15 OF 15

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES