Post Offices in Baldwin Park, California, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Baldwin Park Post Office No Reviews Favorite Fax: (626) 960-3057Phone: (626) 962-0268Retail Hours Irwindale Post Office No Reviews Favorite Fax: (626) 960-3057Phone: (626) 962-0268Retail Hours