Citizens National Bank, Round Rock Branch Basic Info Reviews Routing Numbers Map & Direction Name: Citizens National Bank, Round Rock Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 201 W. Palm Valley Blvd Round Rock, Texas 78664 Williamson County View other branches Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer111902819YY111903999YN From: To: