Arizona county map

Fifteen large counties

Arizona’s counties are among the biggest in the country: with 113,990 square miles divided fifteen ways, the average county is about 7,600 square miles, larger than Connecticut. The four original counties of Arizona Territory (1864) — Mohave, Pima, Yavapai and Yuma — each stretched across the whole width of the territory. The others were cut out of them over the following six decades.

Most county names are Native American. Apache, Cochise, Maricopa, Mohave, Navajo, Pima, Pinal, Yavapai and Yuma all come from peoples of the region; Cochise is the only county in the state named for an individual Apache leader. Coconino is a Hopi word for the Havasupai; Gila is the river; Graham, Greenlee and Santa Cruz are named for a mountain, a prospector and a river. La Paz, the newest county, took the name of a vanished gold-rush town on the Colorado River.

The Navajo Nation covers most of Apache County and large parts of Navajo and Coconino counties, and county lines have little meaning there compared with the reservation’s chapter boundaries. Arizona has no independent cities, and the only consolidated city–county in the state’s history never came about.

All 15 counties of Arizona

Five county facts

• Largest by area: Coconino County, about 18,600 square miles, the second-largest county in the contiguous United States after San Bernardino County, California. It contains Flagstaff, the Grand Canyon and the San Francisco Peaks.
• Smallest by area: Santa Cruz County on the Mexican border, about 1,240 square miles, with its seat at Nogales.
• Most populous: Maricopa County, 4,420,568 people in 2020 — the fourth most populous county in the United States. Phoenix, Mesa, Chandler, Scottsdale, Glendale, Gilbert and Tempe are all inside it.
• Least populous: Greenlee County on the New Mexico line, fewer than 10,000 people, most of them in the copper-mining towns of Clifton and Morenci.
• Oldest and newest: Mohave, Pima, Yavapai and Yuma date from the first territorial legislature of 1864. La Paz County, split from the northern part of Yuma County in 1983, is the newest county in Arizona and among the newest in the country. There are no independent cities.

Reading the map

Press Streets and zoom in to trace the county lines. The northern tier — Mohave, Coconino, Navajo and Apache — is the high Colorado Plateau, cut by the Grand Canyon; the Mogollon Rim runs through Yavapai, Gila and Navajo counties and separates the plateau from the low desert of Maricopa, Pinal, Pima and Yuma. The Colorado River forms the western edge of Mohave, La Paz and Yuma counties along the California and Nevada lines. Arizona keeps Mountain Standard Time all year and does not observe daylight saving; the Navajo Nation, mostly in Apache, Navajo and Coconino counties, is the exception and does change its clocks.

Related maps

• Arizona map — cities, borders and geography.
• Blank Arizona map and printable Arizona map.
• Phoenix, capital and largest city, in Maricopa County; Tucson in Pima County; Mesa.
• Neighbouring county maps: Utah, New Mexico, California, Nevada, Colorado.
• Mountain states · the Southwest · the West · Mountain Time Zone.
• Geography: Grand Canyon, Colorado River, Four Corners, Sonoran Desert.
• All US county maps.