Post Offices in Clifton, New Jersey, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Allwood Post Office No Reviews Favorite Fax: (650) 577-4218Phone: (973) 473-4946Retail Hours Clifton Post Office No Reviews Favorite Fax: (650) 577-4218Phone: (973) 472-0426Retail Hours Delawanna Post Office No Reviews Favorite Fax: (650) 577-4218Phone: (973) 472-0426Retail Hours Main Avenue Post Office No Reviews Favorite Fax: (650) 577-4218Phone: (973) 249-7527Retail Hours