Post Offices

Post Offices in & near Pittsburg, California. Operating hours, locations, phone/fax number, services information.

Pittsburg Post Office

Post Office in Pittsburg, California on Railroad Ave. Operating hours, phone number, services information, and other locations.

Address: 835 Railroad Ave, Pittsburg, CA 94565
Phone: 925-432-2741
Fax: 925-432-9643
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Retail Hours

Monday 9:00am - 5:00pm
Tuesday 9:00am - 5:00pm
Wednesday 9:00am - 5:00pm
Thursday 9:00am - 5:00pm
Friday 9:00am - 5:00pm
Saturday 10:00am - 2:00pm
Sunday Closed

Lobby Hours

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

Last Collection Times

Monday 9:00am - 3:00pm
Tuesday 9:00am - 3:00pm
Wednesday 9:00am - 3:00pm
Thursday 9:00am - 3:00pm
Friday 9:00am - 3:00pm
Saturday 10:00am - 1:00pm
Sunday Closed
Pittsburg Post Office
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Atlantic Plaza Post Office

Address: 296 Atlantic Ave, Pittsburg, CA 94565
Phone: 925-432-2741
Fax: 925-432-9643
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Atlantic Plaza Post Office
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Antioch Post Office

Address: 2730 W Tregallas Rd, Antioch, CA 94509
Phone: 925-757-0379
Fax: 925-778-8149
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Antioch Post Office
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Rivertown Post Office

Address: 420 W 4th St, Antioch, CA 94509
Phone: 925-778-3578
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Rivertown Post Office
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Bay Poin Post Office

Address: 646 Port Chicago Hwy, Bay Point, CA 94565
Phone: 925-432-2741
Fax: 925-432-9643
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Bay Poin Post Office
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Clayton Post Office

Address: 6150 Center St, Clayton, CA 94517
Phone: 925-672-4337
Fax: 925-672-6170
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Clayton Post Office
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