How many counties in Arizona? All 15 listed
Quick answer
Arizona has 15 counties and county equivalents holding 7,268,175 residents. The most populous county in Arizona is Maricopa County with 4,491,987 residents; the smallest is Greenlee County. County boundaries divide the state's land area — measured in square miles by the Census Bureau — into the units used for property assessment, elections and local sales tax. The statewide sales tax base rate is 5.6%, before county and city add-ons.
All 15 counties
Ranked by population, Census 2019-2023 ACS 5-year estimates.
| County | Population | Median income | Median home value | Median rent |
|---|---|---|---|---|
| Maricopa County | 4,491,987 | $85,518 | $414,700 | $1,587 |
| Pima County | 1,049,947 | $67,929 | $286,900 | $1,154 |
| Pinal County | 449,219 | $77,588 | $312,100 | $1,417 |
| Yavapai County | 241,656 | $66,106 | $392,900 | $1,258 |
| Mohave County | 217,420 | $55,799 | $253,200 | $1,047 |
| Yuma County | 207,685 | $60,417 | $195,700 | $983 |
| Coconino County | 144,643 | $69,748 | $413,200 | $1,406 |
| Cochise County | 125,458 | $58,970 | $207,400 | $939 |
| Navajo County | 107,744 | $52,752 | $186,100 | $832 |
| Apache County | 65,680 | $40,338 | $68,500 | $647 |
| Gila County | 53,610 | $59,089 | $247,000 | $1,001 |
| Santa Cruz County | 48,209 | $53,614 | $216,100 | $781 |
| Graham County | 38,860 | $67,326 | $202,700 | $890 |
| La Paz County | 16,605 | $49,506 | $117,600 | $735 |
| Greenlee County | 9,452 | $75,239 | $136,300 | $570 |
Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year
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