Maricopa County leads nation in population increase, surpasses 4.5 million https://www.tucsonsentinel.com/local/report/033123_booming_maricopa/maricopa-county-leads-nation-population-increase-surpasses-45-million/
Maricopa County added 56,831 residents between July 2021 and June 2022, the largest population growth for a county in the nation, with an estimated 4.5 million residents last year - the second straight year the county led the nation in population growth.
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