There are a total of 15 counties in the state of Arizona. Among them, Mohave County is the oldest one (established in 1864) while La Paz County is the youngest (established in 1983). With population of 3,990,181, Maricopa County is the most populated. The biggest county by land area is Coconino County (48,332 km2) and the smallest is Santa Cruz County (3,206 km2). Below please see all Arizona counties which are listed in alphabetical order.
- Apache County, AZ
- Cochise County, AZ
- Coconino County, AZ
- Gila County, AZ
- Graham County, AZ
- Greenlee County, AZ
- La Paz County, AZ
- Maricopa County, AZ
- Mohave County, AZ
- Navajo County, AZ
- Pima County, AZ
- Pinal County, AZ
- Santa Cruz County, AZ
- Yavapai County, AZ
- Yuma County, AZ
Map of Arizona Counties
