Post Offices in Wareham, Massachusetts, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Wareham Post Office No Reviews Favorite Fax: (508) 295-0749Phone: (508) 295-0968Retail Hours Wareham Annex Post Office No Reviews Favorite Fax: (508) 291-8700Phone: (508) 291-8700Retail Hours