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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.