RANKING · 1990 CENSUS · 15 SHOWN OF 15

Largest by population, Arizona counties · 1990

The most populous Arizona counties as of the 1990 population estimates. This list covers the 15 counties in Arizona that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS –

01Maricopa County, AZAZ2,122,101–

02Pima County, AZAZ666,880–

03Pinal County, AZAZ116,379–

04Yavapai County, AZAZ107,714–

05Yuma County, AZAZ106,895–

06Cochise County, AZAZ97,624–

07Coconino County, AZAZ96,591–

08Mohave County, AZAZ93,497–

09Navajo County, AZAZ77,658–

10Apache County, AZAZ61,591–

11Gila County, AZAZ40,216–

12Santa Cruz County, AZAZ29,676–

13Graham County, AZAZ26,554–

14La Paz County, AZAZ13,844–

15Greenlee County, AZAZ8,008–

SHOWING 1–15 OF 15

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