Post Offices in Saint Simons Island, Georgia, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Saint Simons Island Post Office No Reviews Favorite Fax: (912) 634-0054Phone: (912) 638-3621Retail Hours Sea Island Post Office No Reviews Favorite Fax: (912) 638-4786Phone: (912) 638-6486Retail Hours