List of US Post Office Stores in Downey, CA Outlet Note Regular Brands US Post Office California Downey Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - Downey 7911 Imperial Hwy (562) 861-3035 US Post Office outlet - Downey 8111 Firestone Blvd (562) 622-5745 US Post Office outlet - Downey 10345 Lakewood Blvd (562) 861-2917 People Also Viewed