Gifford State Bank Address: 108 E State St, Potomac, IL 61865 Phone: (217) 987-6600 Banks Other Businesses: Casey's General Store at 100 E State St, Potomac, IL 61865 Artesian Cafe at 316 W State St, Potomac, IL 61865 Main Source Bank at 108 E State St, Potomac, IL 61865