Landmark Bank, Sherman Branch Basic Info Reviews Routing Numbers Map & Direction Name: Landmark Bank, Sherman Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 720 East Peyton Street Sherman, Texas 75090 Grayson County View other branches Phone: 903-892-1800 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer081500862YY081506837YN081513930YN103102384YN111917943YN From: To: