Post Offices in & near Walnut, California. Operating hours, locations, phone/fax number, services information.
Post Office in Walnut, California on S Lemon Ave. Operating hours, phone number, services information, and other locations.
Address: 280 S Lemon Ave, Walnut, CA 91788
Phone: 909-444-7901
Fax: 909-598-0524
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
