Buy Postage Stamps in Castro Valley, CA

Post Offices and USPS-authorized retailers where postage stamps are sold in Castro Valley, CA.

All the locations below sell USPS postage stamps which can be used to mail First Class letters in the United States. We list both official post offices run by the United States Postal Service and retailers which have been authorized by USPS to sell postal products in Castro Valley.

Need to mail a letter? See Mailboxes and Post Offices in Castro Valley

Castro Valley Post Office

20283 Santa Maria Ave
Castro Valley, CA 94546
Castro Valley Post Office is a full post office where stamps can be purchased.

Safeway

4015 E Castro Valley Blvd
Castro Valley, CA 94552
 
Safeway is a USPS-authorized retailer where postage stamps are sold.

CVS

3667 Castro Valley Blvd
Castro Valley, CA 94546
 
CVS is a USPS-authorized retailer where postage stamps are sold.

Safeway

20629 Redwood Rd
Castro Valley, CA 94546
 
Safeway is a USPS-authorized retailer where postage stamps are sold.