Post Offices in Piscataway, New Jersey, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List New Market Post Office No Reviews Favorite Fax: (650) 577-4151Phone: (732) 752-5861Retail Hours Piscataway Post Office No Reviews Favorite Fax: (650) 577-4151Phone: (732) 981-0740Retail Hours