County Seat: Florence
Founded: 1875
Area: 5,366 square miles
Population: 375,770 (2010)
Other Major Cities: Apache Junction, Casa Grande, Coolidge, Maricopa, Oracle, Superior
Geographic Highlights: The Superstition Mountains rise in northern Pinal County east of Phoenix, and the county is also home to Boyce Thompson Arboretum, Casa Grande Ruins National Monument and Picacho Peak State Park. You can explore much of the county on the Pinal Pioneer Parkway (State Route 79).