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.