Post Office in St. Charles County, MO

US Post Office
US Post Office

112 South 5th Street, St. Charles County, MO 63301

636-916-3417

Saint Peters Post Office
Saint Peters Post Office

7055 Mexico Road, St. Charles County, MO 63376

636-397-9022

Cottleville Post Office
Cottleville Post Office

5323 State Highway North, St. Charles County, MO 63304

636-447-6537

O Fallon Post Office
O Fallon Post Office

401 Church Street, St. Charles County, MO 63366

636-272-3811

Q&A

1. What services do post offices in the U.S. provide?

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U.S. post offices offer a variety of services including mailing and shipping, passport applications, P.O. Box rentals, money orders, and more.

2. How can I track my mail or package?

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You can track your mail or package using the tracking number provided at the time of shipment. Enter this number on the USPS website or app to see current delivery status.

3. What are the typical operating hours for a U.S. post office?

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Most post offices open from 9 AM to 5 PM on weekdays, with limited hours on Saturdays. However, hours can vary by location, so it’s best to check the specific branch.

4. How do I change my address with the USPS?

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You can change your address online through the USPS website or by filling out a change of address form at your local post office.

5. What should I do if my mail is lost or delayed?

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First, check the tracking status. If there are issues, you can file a claim or request assistance online or at your local post office.

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