Post Offices in Newhall, California, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Lyons Post Office No Reviews Favorite Fax: (661) 254-7318Phone: (661) 253-0771Retail Hours Newhall Post Office No Reviews Favorite Fax: (661) 253-9487Phone: (661) 253-0264Retail Hours