20283 Santa Maria Ave Castro Valley, CA 94546
Phone: 510-581-0159
| Post Office Lobby Hours | |
|---|---|
| Monday | 12:01am - 11:59pm |
| Tuesday | 12:01am - 11:59pm |
| Wednesday | 12:01am - 11:59pm |
| Thursday | 12:01am - 11:59pm |
| Friday | 12:01am - 11:59pm |
| Saturday | 12:01am - 11:59pm |
| Sunday | 12:01am - 11:59pm |
Mailboxes in Castro Valley
Postage Stamps in Castro Valley
Now you can print postage immediately using your home printer. Avoid trips to the Post Office. Print USPS postage online with Stamps.com. Get a 4 week trial if you Start Now.
Castro Valley Post Office is a United States Postal Service (USPS) facility in Castro Valley, CA. This post office offers a full array of services, including package delivery and first class mail.