BankWest, First State Bank Branch Basic Info Reviews Routing Numbers Map & Direction Name: BankWest, First State Bank Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 703 Main Street Armour, South Dakota 57313 Douglas County View other branches Phone: 605-724-2155 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer091400538YY091403836YY From: To: