Popularity:#17 of 28 Post Offices in Marin County#594 of 1,645 Post Offices in California#10,579 in Post Offices
Address, Phone Number, and Hours for Mill Valley Post Office, a Post Office, at East Blithedale Avenue, Mill Valley CA.
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The Mill Valley Post Office, located in Mill Valley, CA, is a branch location of the United States Postal Service (USPS) that serves the Mill Valley 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: