North Star Bank Address: 403 4th Ave, Armstrong, IA 50514 Phone: (712) 868-3500 Banks Other Businesses: Bruce Larson Farms Inc at 4702 30th Ave, Armstrong, IA 50514 Johanson's Cafe and Pizzeria at 429 6th St, Armstrong, IA 50514 915 Cafe at 504 4th Ave, Armstrong, IA 50514 Dairy Queen at 707 C Ave, Armstrong, IA 50514