We have served customers in sioux center since june 1994; 1 interest rates and apys are accurate as of the date shown above and are subject to change without notice. American State Bank Reviews And Rates It was founded in 1913 and has approximately $1 billion in assets. American state bank sioux center cd rates . It literally pays to plan ahead. Sioux center, ia, ia 51250. We have 8 locations across iowa and south dakota: 525 north main street sioux center, iowa 51250. You can search for the best cd rates and jumbo cd rates in state center, ia or by zip you live in. Our office is located on 525 n main ave, sioux center, ia. We offer modern banking services tailored to meet your needs. Home equity monthly payments are based on a loan amount of $50,000. Mobile check deposits from anywhere; American state bank online internet banking: American state bank hours of operation: Our present location was constructed in 2012. Customers can open an account ...