Post Offices in Hilo, Hawaii, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Downtown Hilo Post Office No Reviews Favorite Fax: (808) 934-9804Phone: (808) 933-3014Retail Hours Hilo Post Office No Reviews Favorite Fax: (808) 933-1136Phone: (808) 933-3019Retail Hours