Arizona is a landlocked state in the Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. Its other neighboring states are Nevada to the northwest and California to the west. It also shares an international border with the Mexican states of Sonora and Baja California to the s…Arizona is a landlocked state in the Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. Its other neighboring states are Nevada to the northwest and California to the west. It also shares an international border with the Mexican states of Sonora and Baja California to the south and southwest. It is the 6th-largest and the 14th-most-populous of the 50 states. Its capital and largest city is Phoenix, which is the most populous state capital in the United States.
