Popularity:#2 of 2 Post Offices in Fontana#63 of 79 Post Offices in San Bernardino County#1,156 of 1,645 Post Offices in California#24,583 in Post Offices
View Address, Phone Number, and Hours for Southside Post Office, a Post Office, at Santa Ana Avenue, Fontana CA.
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The Southside Post Office, located in Fontana, CA, is a branch location of the United States Postal Service (USPS) that serves the Fontana community. The customer service postal facility offers mail and package delivery services, P.O. box services, and passport services. The USPS operates as an independent agency within the federal government, supported entirely by revenues generated through its operations.You may contact the Post Office for questions about: