Casa Correo Post Office

4494 Treat Blvd, Concord, CA 94521

Contact Numbers

Phone: 925-687-0533
Fax: 925-874-8544
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Lobby Hours
PO Box Access Available

Monday 6:00am - 7:00pm
Tuesday 6:00am - 7:00pm
Wednesday 6:00am - 7:00pm
Thursday 6:00am - 7:00pm
Friday 6:00am - 7:00pm
Saturday 6:00am - 7:00pm
Sunday Closed

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday Closed
Sunday Closed

*This facility does not process US Passports applications or renewals. Check nearby locations below.

  • Business Line
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online

Visit our Links Page for Holiday Schedule, Change of Address, Hold Mail/Stop Delivery, PO Box rentals and fees, and Available Jobs.

*Please call to verify information. Is anything incorrect? Let us know here

Nearby Post Offices:

Ygnacio Valley
2244 Oak Grove Rd
1.6 miles away

Todos Santos
2043 East St
1.7 miles away

6150 Center St
2.5 miles away

2121 Meridian Park Blvd
2.7 miles away


*Comments below are not read by postal employees. Please do not post personal information.

*By clicking Submit, you agree to our Privacy Policy & Terms of Use.


I am not able to remove a package from my mailbox -it is too big and will not come out. Tried calling local post office - rings then busy, tried 15 times. 1 800 number, still waiting over an hour. There is no customer service at the post office...I am really pissed with no resolve in sight.


I am unable to file this complaint by accessing the mail theft option. There is no option for theft from mailboxes. ZIP: 94521 Location of gang mailboxes: Allegro Ave. next to 5315 Concerto Cir. Today between noon and 2pm one of two gang mailboxes was opened using a mailbox master key, the mailman's key. Impossible to tell how much mail was stolen since it was before the regular mail delivery and our homeowners have been warned not to leave mail over night. Cluster mailboxes were replaced earlier this year after several break-ins in hopes of preventing further mail thefts.

* is not a part of, or affiliated with, the official United States Postal Service (USPS).