Arizona Counties by Population

The most populated counties in Arizona are Maricopa County with 4,585,871, Pima County at 1,063,162, Pinal County with 484,239, Yavapai County at 249,081, and Mohave County with 223,682. You can get the most current Census population data for all 15 Arizona counties, sorted from the most populous counties in Arizona to the least, according to the 2023 Population Estimates Program.

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