Post Offices in Petersburg, Virginia, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Petersburg Post Office No Reviews Favorite Fax: (804) 861-5561Phone: (804) 732-2939Retail Hours Walnut Hill Post Office No Reviews Favorite Fax: (804) 732-1874Phone: (804) 733-2528Retail Hours