Peapack-Gladstone Bank, Summit-Deforest Branch Basic Info Reviews Routing Numbers Map & Direction Name: Peapack-Gladstone Bank, Summit-Deforest Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 48 Deforest Avenue Summit, New Jersey 07901 Union County View other branches Phone: 908-273-2890 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer021205237YY021214312YN221270266YN From: To: