Post Offices in Newark, Delaware, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Federal Post Office No Reviews Favorite Fax: (302) 368-7849Phone: (302) 368-3833Retail Hours Newark Post Office No Reviews Favorite Fax: (302) 738-2490Phone: (302) 737-5771Retail Hours