Post Offices in Oak Harbor, Washington, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Oak Harbor Post Office No Reviews Favorite Fax: (651) 456-6226Phone: (360) 240-1499Retail Hours Whidbey Island Naval Air Post Office No Reviews Favorite Phone: (360) 257-2424Retail Hours