Washington State Bank, Washington State Bank Basic Info Reviews Routing Numbers Map & Direction Name: Washington State Bank, Washington State Bank Main Office: Yes Service: Full Service Brick and Mortar Office Location: 121 S Marion Ave Washington, Iowa 52353 Washington County View other branches Phone: 319-653-2151 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer073902216YY073920735YN From: To: