What is the largest county in Arizona?
Maricopa County is the largest county in Arizona with a population of 4,491,987, according to Census ACS 5-Year.
Context
Arizona has 15 counties.
Top 10
| Maricopa County | 4,491,987 |
| Pima County | 1,049,947 |
| Pinal County | 449,219 |
| Yavapai County | 241,656 |
| Mohave County | 217,420 |
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Frequently Asked Questions
Maricopa County is the largest county in Arizona with a population of 4,491,987, according to Census ACS 5-Year.