Post Offices in Hilton Head Island, South Carolina, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Fairfield Post Office No Reviews Favorite Fax: (843) 689-3548Phone: (803) 926-6354Retail Hours Harbourtown Post Office No Reviews Favorite Phone: (843) 671-2002Retail Hours Hilton Head Island Post Office No Reviews Favorite Fax: (843) 686-8535Phone: (803) 926-6354Retail Hours