Castro Valley mailboxes and post offices

There are 21 United States Postal Service post boxes and offices available to the public in Castro Valley, CA. You can use any one of these locations to mail your letter or small package via USPS. For additional collection boxes in neighboring communities, see the list of post boxes in California.

Public Collection Box
6811 Villareal Dr
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Public Collection Box
4061 E Castro Valley Blvd
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Public Collection Box
2688 Grove Way
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Public Collection Box
3667 Castro Valley Blvd
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Public Collection Box
3067 Castro Valley Blvd
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Public Collection Box
3301 Norbridge Ave
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Public Collection Box
20980 Redwood Rd
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Public Collection Box
21966 Dolores St
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Public Collection Box
20283 Santa Maria Ave
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Public Collection Box
20283 Santa Maria Ave
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Public Collection Box
20283 Santa Maria Ave
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Public Collection Box
20283 Santa Maria Ave
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Mailbox in Post Office Lobby
20283 Santa Maria Ave
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Public Collection Box
1585 B St
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Public Collection Box
22320 Foothill Blvd
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Public Collection Box
1290 B St
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Public Collection Box
1172 A St
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Public Collection Box
22634 2 Nd St
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Public Collection Box
22572 Main St
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Public Collection Box
16250 Foothill Blvd
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