Castro Valley Post Office

20283 Santa Maria Ave, Castro Valley, CA 94546

Contact Numbers:

Phone: 510-581-0159
Fax: 510-581-4074
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Monday-Friday 9:00am - 5:00pm Saturday 9:00am - 1:00pm Sunday Closed

Pickup Services Hours

Monday-Friday 9:00am - 5:00pm Saturday 9:00am - 1:00pm Sunday Closed

Lobby Hours

Monday-Sunday 12:01am - 11:59pm

PO Box Access Hours

Monday-Sunday 12:01am - 11:59pm

PO Box Delivery Time

Monday-Saturday 10:00am Sunday Closed

Last Collection Hours

Monday-Friday 5:00pm Saturday 4:00pm Sunday Closed

Self-Service Kiosk Hours

Monday-Sunday 12:01am - 11:59pm

Carrier Facility Hours

Monday-Friday 9:00am - 4:00pm Saturday 9:00am - 1:00pm Sunday Closed

*This facility is not a US Passport renewal office. Check nearby locations below to apply for or renew your passport.

*Please call to verify all information

  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Priority Mail International®

Visit our Links Page for information pertaining to Change of Address, Hold Mail/Stop Delivery, PO Boxes™ rentals and fees, Rates on Postage Stamps and Freight/Shipping, Holidays, Bulk Mail, Money Orders, and Available Jobs for Employment in a new post office career.

*Is any of the above information incorrect? Let us know here

Nearby Post Offices:

Bradford
822 C St
1.1 miles away

Hayward
24438 Santa Clara St
1.8 miles away

San Lorenzo
15888 Hesperian Blvd
2.1 miles away

South San Leandro
14500 E 14th St
2.3 miles away

Click Here for Larger Map - *Please call to verify location


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