This is a 1.3 percent rise in Maricopa County’s population, from 4,438,342 in 2020 to 4,496,588 in 2021.
Maricopa County had the largest population in Arizona in 2021.
The US Census Bureau found more than 73 percent of counties in the US saw a natural decrease in population in 2021. This is up from a 55.5 percent increase in 2020.
The Midwest suffered the most sustained population decreases, with many counties along the US East Coast and through the Rocky Mountains seeing increases.
The US population continues to grow, though at a slower rate than before.
Arizona Counties By Population Change from 2020 to 2021
| County | 2020 Estimated Population | 2021 Estimated Population | % Change in Population From Year to Year |
|---|---|---|---|
| Pinal County | 429,583 | 449,557 | 4.6% |
| Yavapai County | 237,067 | 242,253 | 2.2% |
| Mohave County | 214,070 | 217,692 | 1.7% |
| Maricopa County | 4,438,342 | 4,496,588 | 1.3% |
| Navajo County | 106,802 | 108,147 | 1.3% |
| Yuma County | 204,437 | 206,990 | 1.2% |
| Graham County | 38,614 | 39,050 | 1.1% |
| Pima County | 1,045,599 | 1,052,030 | 0.6% |
| Gila County | 53,306 | 53,589 | 0.5% |
| Cochise County | 125,398 | 126,050 | 0.5% |
| Santa Cruz County | 47,653 | 47,883 | 0.5% |
| Coconino County | 145,116 | 145,052 | 0% |
| Apache County | 65,897 | 65,623 | -0.4% |
| La Paz County | 16,580 | 16,408 | -1% |
| Greenlee County | 9,522 | 9,404 | -1.2% |
ORGANIZATIONS IN THIS STORY
Youngtown• New River• Sun Lakes• City of Goodyear• Town of Cave Creek• City of Tolleson• Town of Guadalupe• Kaka• Citrus Park• City of Tempe• City of Chandler• Theba• Wittmann• Carefree• Town of Gilbert• Wintersburg• Gila Bend• Fountain Hills• City of Surprise• City of Avondale• City of Litchfield Park• Sun City West• Anthem• Rio Verde• Aguila• Morristown• City of Mesa• Buckeye• City of Glendale• Tonopah• City Of Scottsdale• City Of El Mirage• Arlington• Sun City• City Of Phoenix• Town Of Paradise Valley• Komatke• Gila Crossing• Maricopa Colony
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