The Suffolk County National Bank of Riverhead, Miller Place Branch Basic Info Reviews Routing Numbers Map & Direction Name: The Suffolk County National Bank of Riverhead, Miller Place Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 159 Route 25a Unit 21 Miller Place, New York 11764 Suffolk County View other branches Phone: 631-474-8400 Please enable JavaScript to view the comments powered by Disqus. From: To: