Great Plains Bank is a community bank focused on exceeding our customers’ expectations & providing modern, convenient services. We offer a full suite of personal and business banking solutions, including savings accounts, checking accounts and loans. With locations across Oklahoma and Texas, we are proud to have served generations since our establishment in 1907. As the years passed, we’ve grown our product offerings to better serve our customers, but we haven’t forgotten what has made us great. It’s the relationships we create with people, the partnerships we build with communities, and our belief in moving forward - together. Mental Health Services.