RANKING · 2010 CENSUS · 15 SHOWN OF 15

Most population gained, Arizona counties · 2010

Arizona counties that added the most residents from the 2000 census to 2010, by raw count of people rather than percentage. This list covers the 15 counties in Arizona that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Maricopa County, AZAZ4,689,558+744,968−22%

02Pinal County, AZAZ539,380+196,043+209%

03Pima County, AZAZ1,074,685+136,517−23%

04Mohave County, AZAZ228,102+45,154−27%

05Yavapai County, AZAZ252,552+43,516−27%

06Yuma County, AZAZ224,449+35,725−33%

07Coconino County, AZAZ144,368+18,101−8%

08Cochise County, AZAZ126,332+13,591−32%

09Navajo County, AZAZ109,946+9,979−50%

10Santa Cruz County, AZAZ50,020+9,039+4%

11Graham County, AZAZ40,157+3,731−46%

12Gila County, AZAZ53,801+2,262−80%

13Apache County, AZAZ64,445+2,095−73%

14La Paz County, AZAZ16,711+774−87%

15Greenlee County, AZAZ9,312-110−120%

SHOWING 1–15 OF 15

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