Map and Directions

Contact Us

Assumption Church
403 North Main Street, O'Fallon, MO 63366

The Parish Office is visible from Main Street,
located in the building between the Chapel and the Main Church.

Parish Office:  636-240-3721 
Day School Office:  636-240-4474
Parish School of Religion (PSR) Office: 636-240-1020

Parish Office Hours:
Monday - Friday 8:30 AM - 4:00 PM

Closed on some holidays.
Please see our bulletin for specific dates of closing.