Landmark Bank, Denison Branch Basic Info Reviews Routing Numbers Map & Direction Name: Landmark Bank, Denison Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 2820 West Fm 120 Denison, Texas 75020 Grayson County View other branches Phone: 903-464-9100 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer081500862YY081506837YN081513930YN103102384YN111917943YN From: To: