Post Offices in Martinez, California, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Court Post Office No Reviews Favorite Fax: (925) 874-8544Phone: (925) 229-4795Retail Hours Martinez Post Office No Reviews Favorite Fax: (925) 228-1244Phone: (925) 228-2722Retail Hours Pacheco Post Office No Reviews Favorite Fax: (925) 874-8544Phone: (925) 228-2722Retail Hours