Arizona is a state located in the southwestern United States. It is bordered by four other states: Sonora to the south, Utah to the northeast, Nevada to the northwest, and Mexico to the south. Additionally, two cities within Arizona, Mesa and Yuma, are also considered neighbors of the state. Sonora is a Mexican state located south of Arizona, Utah is a state located northeast of Arizona, Nevada is a state located northwest of Arizona, and Mexico is a country located south of Arizona. Mesa and Yuma are both cities located within Arizona.