Armstrong Bank | 1,616 followers on LinkedIn. Family owned and operated since 1909... Proudly serving locations across Oklahoma and Arkansas. | Since 1909, Armstrong Bank has taken pride in providing exceptional customer service. As a family-oriented bank with locations across Oklahoma and Arkansas, our banking experts live and work in the communities that they serve. Armstrong employees dedicate their time and talents to a wide variety of community organizations and are always working to exceed community and customer expectations.