Southside Post Office

16731 Santa Ana Ave, Fontana, CA 92337

Contact Numbers

Phone: 909-350-3466
Fax: 909-350-3855
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours







Lobby Hours
PO Box Access Available

Monday 6:00am - 6:00pm
Tuesday 6:00am - 6:00pm
Wednesday 6:00am - 6:00pm
Thursday 6:00am - 6:00pm
Friday 6:00am - 6:00pm
Saturday 6:00am - 4:00pm
Sunday Closed

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 3:00pm
Sunday Closed

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

  • Burial Flags
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Sure Money
  • Lot 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:

Bloomington
10191 Linden Ave
1.7 miles away

Fontana
8282 Sierra Ave
1.9 miles away

Rialto
241 W Rialto Ave
3.2 miles away

Rubidoux
8082 Limonite Ave Ste 1
3.3 miles away

Reviews

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THEY NEVER ANSWER just rings or they pick up and then hang up WORST EVER and they wonder why people are rude
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I've called ALL Day and no answer. Ever. It rings forever and then there is a busy signal. Why even have a phone?
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