Post Offices in Danville, California, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Danville Post Office No Reviews Favorite Fax: (925) 736-4759Phone: (925) 736-0775Retail Hours Danville Square Post Office No Reviews Favorite Fax: (925) 314-0943Phone: (925) 314-9650Retail Hours