County Seat: Parker
Founded: 1983
Area: 4,500 square miles
Population: 20,489 (2010)
Other Major City: Quartzsite
Geographic Highlights: La Paz is Arizona’s youngest county and the only one formed since Arizona gained statehood in 1912. The Parker Strip section of the Colorado River is a major tourist attraction, while Quartzsite is a popular destination for winter visitors to the state.