First Guaranty Bank, Greensburg Branch Basic Info Reviews Routing Numbers Map & Direction Name: First Guaranty Bank, Greensburg Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 6151 Hwy 10 Greensburg, Louisiana 70441 St. Helena County View other branches Phone: 225-222-6101 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer065201381YN065404340YY065404353YN From: To: