There are 15 counties in the U.S. state of Arizona. The names of many of the counties pay tribute to the state's Native American heritage. Nine of the fifteen counties are named after various native groups that are resident in parts of what is now Arizona.

Three of the other counties have Spanish names from the language of the early Hispanic explorers of Arizona: La Paz County, Santa Cruz County, and Pinal County. Another county, Graham County, is named for a physical feature, Mount Graham, with the final county, Greenlee County, being named after one of the state's early pioneers.