RANKING · 1990 CENSUS · 15 SHOWN OF 15

Least educated, Arizona counties · 1990

Arizona counties with the smallest share of adults 25+ holding a bachelor's degree or higher (1990 ACS). 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

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPBACHELOR'S DEGREE OR HIGHERVS –

01Pinal County, AZAZ539,3808.2%–

02Apache County, AZAZ64,4458.5%–

03La Paz County, AZAZ16,7118.5%–

04Gila County, AZAZ53,8019.7%–

05Navajo County, AZAZ109,94610.0%–

06Mohave County, AZAZ228,10210.3%–

07Greenlee County, AZAZ9,31210.4%–

08Santa Cruz County, AZAZ50,02010.8%–

09Graham County, AZAZ40,15711.3%–

10Yuma County, AZAZ224,44912.7%–

11Cochise County, AZAZ126,33216.1%–

12Yavapai County, AZAZ252,55217.7%–

13Maricopa County, AZAZ4,689,55822.1%–

14Pima County, AZAZ1,074,68523.3%–

15Coconino County, AZAZ144,36824.6%–

SHOWING 1–15 OF 15

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