National Bank-AZ Address: 102 Fairgrounds Rd, Duncan, AZ 85534 Phone: (928) 359-2415 Banks Other Businesses: Chapparral Mini Mart at 500 High St, Duncan, AZ 85534 Chapparral Motel & Convenience Store at 506 High St, Duncan, AZ 85534 Simpson Hotel at 116 Main St, Duncan, AZ 85534 Humble Pie at 117 Main St, Duncan, AZ 85534