Arizona Population By County in 2018
Updated on January 29, 2024.
According to the US Census Bureau population estimates, there were 7,164,228 people living in Arizona in 2018. Maricopa County was the most populated county with 4,405,306 residents, followed by Pima County with 1,037,746 residents, and Pinal County with 446,524 residents. Greenlee County with a population of 9,424 was the least populated county in Arizona in 2018.
Use the map below to interactively explore the population for each county in Arizona in 2018. The data can also be explored further by sorting and filtering with the table below.
You can see similar information for other states and by state for the United States.
Related Topics: Arizona Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
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Arizona Population By County in 2018
Table of Arizona Population By County in 2018
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| County | Population | % of State Population |
|---|---|---|
| Apache | 71,819 | 1.00% |
| Cochise | 126,581 | 1.77% |
| Coconino | 142,914 | 2.00% |
| Gila | 53,833 | 0.75% |
| Graham | 38,032 | 0.53% |
| Greenlee | 9,424 | 0.13% |
| La Paz | 21,030 | 0.29% |
| Maricopa | 4,405,306 | 61.49% |
| Mohave | 210,371 | 2.94% |
| Navajo | 110,490 | 1.54% |
| Pima | 1,037,746 | 14.49% |
| Pinal | 446,524 | 6.23% |
| Santa Cruz | 46,446 | 0.65% |
| Yavapai | 232,467 | 3.25% |
| Yuma | 211,245 | 2.95% |