Carrier Square Post Office

1720 Market St Rm G206, Saint Louis, MO 63155

Contact Numbers

Phone: 314-345-2818
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Carrier Facility: This location is for mail processing only. For retail services, please use one of the nearby locations below.

  • Business Line
  • Pickup Accountable Mail
  • Pickup Hold Mail

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:

Main Office Finance Postal Store
1720 Market St Lobby
0.0 mile away

Saint Louis
1720 Market St Rm 3035
0.0 mile away

Henry W Wheeler
1140 Olive St
0.4 mile away

Jefferson Memorial
111 N 6th St
0.6 mile away


*Comments below are not read by postal employees. Please do not post personal information.

*By clicking Submit, you agree to our Privacy Policy & Terms of Use.


I'm am seeking employment

* is not a part of, or affiliated with, the official United States Postal Service (USPS).