RANKING · 1990 CENSUS · 15 SHOWN OF 15

Oldest by median age, Arizona counties · 1990

Arizona counties ranked by median age of residents (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

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS –

01Yavapai County, AZAZ252,55242.5–

02Mohave County, AZAZ228,10240.2–

03Gila County, AZAZ53,80138.8–

04La Paz County, AZAZ16,71136.2–

05Pima County, AZAZ1,074,68532.9–

06Cochise County, AZAZ126,33232.9–

07Pinal County, AZAZ539,38032.8–

08Maricopa County, AZAZ4,689,55832.1–

09Greenlee County, AZAZ9,31231.8–

10Yuma County, AZAZ224,44930.4–

11Graham County, AZAZ40,15730.0–

12Santa Cruz County, AZAZ50,02029.1–

13Navajo County, AZAZ109,94626.7–

14Coconino County, AZAZ144,36826.3–

15Apache County, AZAZ64,44523.6–

SHOWING 1–15 OF 15

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