Post Offices in Du Bois, Pennsylvania, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Du Bois Post Office No Reviews Favorite Fax: (814) 371-9209Phone: (814) 371-5530Retail Hours Liberty Post Office No Reviews Favorite Phone: (814) 371-1591Retail Hours