Saint Clair Post Office

1020 Plaza Ct S Ste a, Saint Clair, MO 63077

Contact Numbers

Phone: 636-629-1866
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 24 hours
Tuesday 24 hours
Wednesday 24 hours
Thursday 24 hours
Friday 24 hours
Saturday 24 hours
Sunday 24 hours

Last Collection Times

Monday 4:30pm
Tuesday 4:30pm
Wednesday 4:30pm
Thursday 4:30pm
Friday 4:30pm
Saturday 12:00pm
Sunday Closed

Bulk Mail Acceptance Hours

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 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)
  • Packaged Stamps
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • 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:

1276 N Highway 47
4.2 miles away

Villa Ridge
461 Highway M
6.0 miles away

51 Highway W
6.0 miles away

3735 Highway 30
6.3 miles away


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I had 4 packages that were supposed to be delivered today The carrier brought 2 plus all my paper mail. I asked him, "is this everything?" He sad yes, then on my app i see he claimed 2 items couldn't be delivered because he couldn't access my driveway... HE WAS IN MY DRIVEWAY HE EVEN SPOKE TO ME... HE'S A LIAR! I don't appreciate your employees halfass doing their job & blaming me because they couldn't do it correctly... He should be reprimanded!


Postal carrier did not attempt to leave mail, just left note.


I had some friends want to surprise me and send me a packaged while I was on vacation visiting my parents. Well they mailed it from st clair to Texas overnight r 2 day express and call me. And told me to watch for a surprise well after 4 days still nothing I track it and it say it was delivered in st clair don't say where but that is where it was mailed from and it cost them a hundred dollar . So where is the package and I think some one needs to return some money cuz it didn't come to Texas


Terrible service. Mail lady will not get out of vehicle to deliver packages. Honks horn on the street. Ive been tracking multiple packages that are on the trucks for delivery then dont get delivered then says held at post office at customer request. Why the f@ck would i ask u to take it back to the post office and hold it when u drove to my house and delivered paper mail and decided not to drop off the package. What a disgrace. My gf went out last night and took the mail by hand so no excuse but the lady just didnt even know she had the package. What do i gotta f@cking do to get my god d@mn mail in this town.


You could call and make a formal complaint. Or try maybe being nicer🤷🏿‍♂️ Or even post your bullshit on a page where the mail people will see it, not a 3rd party site that helps people find postal locations. Just a thought.
• Replied to Dustin Reed


Does this say reviews? Sure the f does. And they delivered my package at 730am the following day, id say they read it just fine considering they deliver after 5pm usually. Thanks for ur opinion jack.
• Replied to Dustin Reed

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