Saint Ann Post Office

10401 International Plaza Dr, Saint Ann, MO 63074

Contact Numbers

Phone: 314-428-5380
Fax: 314-428-0331
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 8:30am - 5:30pm
Tuesday 8:30am - 5:30pm
Wednesday 8:30am - 5:30pm
Thursday 8:30am - 5:30pm
Friday 8:30am - 5:30pm
Saturday 8:30am - 2:00pm
Sunday Closed

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 2:30pm
Sunday Closed

Passport Appointment Hours*

Monday 10:30am - 3:30pm
Tuesday 10:30am - 3:30pm
Wednesday 10:30am - 3:30pm
Thursday 10:30am - 3:30pm
Friday 10:30am - 3:30pm
Saturday Closed
Sunday Closed

  • Visit our Passport FAQ page for a complete overview of what to bring, what you need to know, and how long it will take.
  • You will need two forms of Identification with copies.
  • A passport quality photo. Available at location.
  • The appropriate application form printed and filled out, and the required fee for applying or renewing.
  • You can find up to date costs, information, and forms at the State Departments Travel Site

*An appointment is required to apply for or renew US Passports. Please Call or schedule online.

Bulk Mail Acceptance Hours

Monday 9:00am - 1:00pm
Tuesday 9:00am - 1:00pm
Wednesday 9:00am - 1:00pm
Thursday 9:00am - 1:00pm
Friday 9:00am - 1:00pm
Saturday Closed
Sunday Closed

  • 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)
  • Packaged Stamps
  • Passport Acceptance
  • Passport Photo
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Lot Parking
  • Passport Appointment Hours

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:

Hazelwood Bridgeton Ca
5750 Phantom Dr
1.5 miles away

Timothy M Gaffney
2318 Woodson Rd
1.6 miles away

6135 N Lindbergh Blvd
1.8 miles away

12255 Natural Bridge Rd
1.9 miles away


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I went to the parking lot of the St. Ann, MO post office, got out of the car, and put my letter in the mail box. When leaving, I saw that the front of the box was taped over and marked OUT OF ORDER. I am assuming that no one will empty the box. What happens to my letter? I tried to use the online help on this site. It was not helpful. What do I do now?


No one ever answers the phone! Ever! I live in duplex and my neighbor just moved out - we are not related but have the same last name. My mail has been canceled along with hers!! From past experience, Im sure I will not get anywhere when I go to office.


Very Horrible with delivery never answers the phone can’t go up there to see where is my mail if I can’t pay my rent because of a unprofessional ignorant post office im just going to take it the legal way


just wondering since the temperature is above freezing will i get mail delivered this used to be a great post office 10 -15 years ago how you people keep your jobs is a mystery !!!!


You could be able to open 1 office so that those of us that have to mail packages.


Yo this post office is the most annoying and retarded post office ever! They act like the hot Down syndrome when u try to talk with a manager or someone in the office, then they will deliver packages 📦 late at night when the office is not open or won’t knock on your door 🚪 to see if your at home to deliver the package!! I’m so fed up wit this post office! I encourage anybody to get a P.O. Box or use another post office!!!! They are a F + in my book! 🤬😡


My neighbors and I have a big problem about our mail delivery times. Most of the time our daily mail delivery doesn't take place until after 4:00 PM. Most of the time the delivery doesn't take place until much later and often in the fall and winter AFTER DARK! It has always been a puzzle as to why our mail delivery has to be so late in the day? I see mail delivery occur much earlier in the day for everyone except the 4100 address on Wright Ave. WHY?


I am beginning to think that the person who gets the short straw gets the area including Stephens Place because 1. it is rarely the same person, 2. seems that some days no one shows up, 3. you certainly can't count on it being delivered by a specific time, and 4. mail that you would normally expect (Wed grocery ads) don't show up at all.

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