Grinnell State Bank Address: 1101 Court Ave, Marengo, IA 52301 Phone: (319) 642-5511 Banks Other Businesses: State Farm Insurance at 174 E Washington St, Marengo, IA 52301 Keystone Savings Bank at 330 Western Ave, Marengo, IA 52301 Gary's Repair at 245 Western Ave, Marengo, IA 52301 Edwards, Gary at 1689 108th St, Marengo, IA 52301