Full list of Post office in Saint Marks, Florida On this page you can see all Post office in Saint Marks, Florida. Closed United States Postal Service Establishment, Finance, Post office 779 Port Leon Drive, Saint Marks, FL 32355 +1 800-275-8777 MIAMICOMPANIES.COM Saint Marks Post office Categories of companies in Saint Marks, Florida All categories Electronics store Establishment Finance Food Gas station General contractor Home goods store Local government office Lodging Meal takeaway Painter Park Post office School Storage Supermarket