About Premier Bank: Official Website :https://www.yourpremierbank.com/?y_source=1_MTU1NzY4OTItNzE1LWxvY2F0aW9uLndlYnNpdGU%3D Official Premier Bank Defiance Ohio Customer Service: You can also call Bank-by-Phone at 800-315-6350 or you can call 800-501-6535