List of US Post Office Stores in Morongo Valley, CA Outlet Note Regular Brands US Post Office California Morongo Valley Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - Morongo Valley 49649 29 Palms Hwy (760) 363-7354 People Also Viewed