Arizona is one of the Four Corner states of the country. It is the 6th largest state in terms of area in the US. As such, there are 16 Extra Space storage facilities in this state. The majority of these storage units are concentrated in the southern part of the state in Phoenix and Tucson. The largest city, which is also the capital of the state, Phoenix, has 8 Extra Space storage facilities. Mesa has 3 such storage facilities, while Tempe and Tucson have 2 storage facilities each. Lastly, Peoria has a single Extra Space storage facility.