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Postal Rivertown Post Office
420 W 4th St, Antioch, CA 94509
Phone: 925-778-3578
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)
PO Box Access Available
Monday 6:30am - 6:30pm
Tuesday 6:30am - 6:30pm
Wednesday 6:30am - 6:30pm
Thursday 6:30am - 6:30pm
Friday 6:30am - 6:30pm
Saturday 8:00am - 6:00pm
Sunday Closed
Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 5:00pm
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
- Street Parking
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:
Antioch
2730 W Tregallas Rd
0.8 mile away
Pittsburg
835 Railroad Ave
2.9 miles away
Atlantic Plaza
296 Atlantic Ave
3.1 miles away
Oakley
400 Del Antico Ave
4.3 miles away
Contra Costa County
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