Gaming in Arizona is governed by the Arizona Tribal-State Gaming Compacts (Compacts) between the State and all 22 federally recognized Arizona tribes. The Compact with each of the 22 tribes is substantially identical, lasts for 10 years and can be renewed for another decade and an additional three-year term. The Compact is part of Arizona law.

16 Arizona tribes operate 24 Class III casinos in the State. Another six tribes do not have casinos but have slot machine rights that they may lease to other tribes with casinos (Transfer Agreements).

Under the Compacts, a maximum of 20,500 slot machines are allowed in the State, including Transfer Agreements (tribes with Compacts may transfer their slot machines to other recognized tribes, allowing those that do not have casinos, or are located in remote areas, to receive gaming revenue). Currently there are about 15,600 slot machines in operation. The maximum wager limit for a slot machine is $35 per play for most tribes.