Post Offices in Clackamas, Oregon, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Clackamas Post Office No Reviews Favorite Fax: (503) 557-0197Phone: (503) 657-9358Retail Hours Clackamas Dcu Post Office No Reviews Favorite Fax: (503) 659-4766Phone: (503) 653-6097Retail Hours