Post Offices in Hammond, Indiana, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Hammond Post Office No Reviews Favorite Fax: (219) 937-9470Phone: (219) 932-2757Retail Hours Hessville Post Office No Reviews Favorite Phone: (219) 844-2416Retail Hours South Calumet Avenue Post Office No Reviews Favorite Phone: (219) 932-0346Retail Hours