| Home > Post Office | ||
| All phone numbers listed are in Area Code 510 unless otherwise noted. The U.S. Post Office is located at 20283 Santa Maria Ave., Castro Valley 94546, a short block off of Castro Valley Blvd. Phone: 581-0159 Fax: 783-0460. The hours of operation are 8 a.m. to 5 p.m. Monday through Friday, and 9 a.m. to 1 p.m. Saturdays.
|
