RANKING · 2000 CENSUS · 15 SHOWN OF 15

Most population gained, Arizona counties · 2000

Arizona counties that added the most residents from the 1990 census to 2000, by raw count of people rather than percentage. This list covers the 15 counties in Arizona that qualify, ranked against each other statewide. The median across all 15 is +19,812.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS –

01Maricopa County, AZAZ4,689,558+950,048–

02Pima County, AZAZ1,074,685+176,866–

03Pinal County, AZAZ539,380+63,348–

04Mohave County, AZAZ228,102+61,535–

05Yavapai County, AZAZ252,552+59,803–

06Yuma County, AZAZ224,449+53,131–

07Cochise County, AZAZ126,332+20,131–

08Navajo County, AZAZ109,946+19,812–

09Coconino County, AZAZ144,368+19,729–

10Gila County, AZAZ53,801+11,119–

11Santa Cruz County, AZAZ50,020+8,705–

12Apache County, AZAZ64,445+7,832–

13Graham County, AZAZ40,157+6,935–

14La Paz County, AZAZ16,711+5,871–

15Greenlee County, AZAZ9,312+539–

SHOWING 1–15 OF 15

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS