Post Offices in Sonora, California, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Downtown Sonora Post Office No Reviews Favorite Phone: (209) 533-8369Retail Hours Sonora Post Office No Reviews Favorite Fax: (209) 532-6389Phone: (209) 533-3670Retail Hours