South Beloit Post Office

311 Oak Grove Ave, South Beloit, IL 61080

Contact Numbers

Phone: 815-389-1367
Fax: 815-389-1617
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 5:30am - 5:30pm
Tuesday 5:30am - 5:30pm
Wednesday 5:30am - 5:30pm
Thursday 5:30am - 5:30pm
Friday 5:30am - 5:30pm
Saturday 5:30am - 4:30pm
Sunday Closed

Last Collection Times

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

Bulk Mail Acceptance Hours

Monday 8:30am - 2:00pm
Tuesday 8:30am - 2:00pm
Wednesday 8:30am - 2:00pm
Thursday 8:30am - 2:00pm
Friday 8:30am - 2:00pm
Saturday Closed
Sunday Closed

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

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • 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
  • 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:

300 Mill St
0.5 mile away

214 W Main St
2.0 miles away

11320 Main St
2.8 miles away

5316 S County Road D
4.8 miles away


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I would appreciate it when I have a package to be delivered it's Not Shoved in my mailbox! I live in South. Bluff so the boxes aren't that big as it is plus all these Stupid newspapers get put in it... I'm going to start saving these papers and shove them in the post office mailbox.


Our carrier is careless. Wrong mail in the boxes, boxes slammed shut, left bouncing, and open. We miss Peggy!


Filled out forms to have our mail forwarded to our vacation home. Even had the postal employee check to insure all filled out correctly. Were not getting mail, called neighbor to check our mail box. She said we had mail. Called S. Beloit, IL. post office. The guy said he remembered us. Said he doesn't know what happened and since we were going to be back in 31/2 weeks it was to late to have mail forwarded now. WTF!!


Does anyone pick up mail from the box located outside the flying j on i90 exit 1? I mailed a letter from there 2 months ago. It still has not been received. It was going to pekin, il.

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