List of US Post Office Stores in Leavenworth, KS Outlet Note Regular Brands US Post Office Kansas Leavenworth Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - Leavenworth 330 Shawnee St (913) 680-1648 People Also Viewed