Live for Today. Bank for Tomorrow. With humble beginnings originating in 1909 in the small village of Dieterich, this community bank has grown from 2 employees to over 130 serving 8 communities in Illinois: Dieterich, Teutopolis, Newton, Lake Sara, Effingham, Red Bud, Belleville, and St. Elmo. Dieterich Bank is continuing to grow and expand with assets reaching $700 Mil. We have recently been named a 2019 Best Places to Work in Illinois, and have won several local awards for "Best Bank." Member FDIC, Equal Housing Lender Dieterich Bank NMLS# 408244