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US Post Office
One of 7 shipping or delivery service listings in Castro Valley.
About US Post Office
US Post Office is a shipping or delivery service in the public service and government sector, based in Castro Valley, CA. Its recorded address is 20283 Santa Maria Ave, 94546. The listing includes a telephone number, an official website. It is one of 7 shipping or delivery service listings tracked in Castro Valley; the nearest comparable listing is CASTRO VALLEY, within walking distance in CASTRO VALLEY. US Post Office has 7,292 listed locations in total; this page covers the Castro Valley branch.
- Address
- 20283 Santa Maria Ave, Castro Valley, CA, 94546
- Phone
- (800) 275-8777
- Website
- tools.usps.com
- Social
Questions
Where is US Post Office located?
20283 Santa Maria Ave, Castro Valley, CA, 94546
How do I contact US Post Office?
(800) 275-8777 · https://tools.usps.com/find-location.htm?location=1440443
What type of business is US Post Office?
US Post Office is a shipping or delivery service (public service and government) in Castro Valley.
US Post Office branches
US Post Office has 7,292 listed locations. This branch is in Castro Valley.
- Kailua Kona96740-2440
- Hilo96720
- Hilo96720
- Laupahoehoe96764-9997
- Kapaau96755-3001
- Kihei96753
- Lanai City96763
- Pukalani96788
- Lahaina96761
- Honolulu96817
Nearby shipping or delivery service
- CASTRO VALLEYCASTRO VALLEY0.0 km
- United States Postal ServiceCastro Valley0.0 km
- UPS Authorized Shipping OutletCastro Valley0.3 km
- Amazon Locker - TaubeCastro Valley0.4 km
- UPS Access Point locationCastro Valley0.6 km
- UPS Access Point locationCastro Valley0.7 km
- UPS Access Point locationCASTRO VALLEY0.7 km
- Amazon Counter - Health Mart PharmacyHAYWARD2.1 km
- Hayward MailboxesHayward1.8 km
- FedEx Office Print & Ship CenterHayward2.2 km
- UPS StoreHayward2.4 km
- UPS Access Point locationHayward2.5 km
- UPS Access Point locationHayward2.7 km
- The UPS StoreHayward2.8 km
- Amazon Locker - HertaHayward2.9 km
Cite this page
“US Post Office, Castro Valley — business.wiki, retrieved August 2026.” Facts on this page come from openly licensed data (Overture Maps Foundation) and are refreshed with each monthly release; sourcing is documented on the methodology page.