Post Offices in Gary, Indiana, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List 15th Avenue Post Office No Reviews Favorite Phone: (219) 882-6472Retail Hours Gary Post Office No Reviews Favorite Fax: (219) 886-8211Phone: (219) 886-8000Retail Hours Glen Park Post Office No Reviews Favorite Phone: (219) 884-2850Retail Hours Miller Post Office No Reviews Favorite Phone: (219) 938-9701Retail Hours Tolleston Post Office No Reviews Favorite Phone: (219) 944-7795Retail Hours