Post Offices in Hayward, California, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Bradford Post Office No Reviews Favorite Fax: (510) 783-0460Phone: (510) 783-5963Retail Hours Hayward Post Office No Reviews Favorite Fax: (510) 783-0460Phone: (510) 783-5963Retail Hours Mount Eden Post Office No Reviews Favorite Fax: (510) 783-0460Phone: (510) 782-5636Retail Hours