Post Offices in San Luis Obispo, California, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Mission San Luis Obispo Post Office No Reviews Favorite Fax: (805) 545-0812Phone: (805) 541-9138Retail Hours San Luis Obispo Post Office No Reviews Favorite Fax: (805) 545-0812Phone: (805) 543-2605Retail Hours