What is the population of Maricopa County, AZ?
Maricopa County in Arizona has a population of 4,491,987, per Census ACS 5-Year estimates. The median household income is $85,518 and the median age is 37.5.
Context
Counties are the primary administrative subdivisions of states and a stable unit for tracking population. Maricopa County's population reflects everyone within county lines, including residents of incorporated cities and unincorporated areas.
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Maricopa County in Arizona has a population of 4,491,987, per Census ACS 5-Year estimates. The median household income is $85,518 and the median age is 37.5.