United States Postal Service

Category: Post office

Address: 20283 Santa Maria Ave, Castro Valley, CA 94546, USA

Phone: +18002758777

Opening hours

Sunday: Closed

Monday: 9AM–5PM

Tuesday: 9AM–5PM

Wednesday: 9AM–5PM

Thursday: 9AM–5PM

Friday: 9AM–5PM

Saturday: 9AM–1PM

Reviews

M X

Dec 15, 2021

Been here twice, there is a lady who is “helping” people who are in line, but turns out there were misleading and lost package. To people who needs to mail out important things, go other places please.

Susan Huberich

Oct 12, 2021

USPS continues to lose priority packages, to fail to scan packages when they are picked up, fails to process packages in a timely manner, loses packages and ties customer up in long robot phone wait times. Customer service fails 90% of the time - is like this office does not care at all.

Sandrine Carmantrand

Aug 17, 2020

Every time I’ve been to this post office, I’ve always have a good service. The employees are courteous and helpful. The lines is often long, but it moves pretty quickly. After experiencing the San Francisco‘S post offices, I’m thankful for this one!

M Wong

Jan 11, 2020

Since there are usually long lines at the post office, the customer service here is curt and brief. There were only 2 postal workers at the counter. The customers are patient for their turn. There is parking in front. Rather than waiting in line, you can drop off your letter or package in the postal box inside the area where there is a machine to buy stamps or when your car exits the parking lot.

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Questions & Answers

Is the Post office delivering today.

Elizabeth Whitley | Aug 22, 2020
Arunkumar RS | Aug 22, 2020

Yes.

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Is drop box available at this location?? If no, any locations out there around Hayward??

Seshu Varma | May 24, 2022
Tiffany Ngo | May 24, 2022

There are 3 mail boxes for letters at this location that are located outside the Post Office. Additionally, there is one mailboxes to drop packages inside the building, which should be available 24/7. However, in my experience, the mailbox for packages typically gets jammed.

How can I get a copy of my receipt with the tracking Number of the stuff I returned on July 7, 2020?

Lynda Lovekin | Aug 22, 2020
Carlos Melara | Aug 22, 2020

Call the post office

Will the post office be open during the "quarentine" period?

Dayanna G | Aug 22, 2020
Tim Mosier | Aug 22, 2020

Yes

How I can stop my mail for a week

A Google User | Aug 23, 2019
Donut Chan | Aug 23, 2019

You have to request a hold on your mail.

What are the lobby hours at Castro Valley, California Post Office in order that one may access their Post office box?

Teresa Lydon | Aug 23, 2018
Teresa Lydon | Aug 23, 2018

Just found out - 12:01 am to 11:59 pm. Mon - Sun ( closed for only 2 minutes each day ? Such are the hours listed on their specific Castro Valley website )

dropped off UPS package instead of USPS one, how do I locate it ?

George Mateo Roqué | Aug 23, 2018
Arsenio Delacruz | Aug 23, 2018

Notify the carrier for pickup or find out closest ups carrier near you.

Is it possible to send seeds of vegetables to canada?

[email protected] Edison | Aug 23, 2018
Arsenio Delacruz | Aug 23, 2018

Absolutely legal seeds from vegetables are mailable, you must show proof to the window clerk that they are legal seeds. Anything more than 13 ounce of packages must be shown to the window clerk for airline security purposes. Good luck.

Change of address how do i file

William Torres | Aug 23, 2018
Rose Briner | Aug 23, 2018

You can do it either at the post office or online

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