Archdiocese of St. Louis
Assumption (O'Fallon)
O'Fallon, MO 63366
Parish Information
403 N. Main St., O'Fallon, MO
O'Fallon, MO 63366
Part of the
Archdiocese of St. Louis
Add a Business Finder to Your Parish Website
Help parishioners find Catholic businesses — embed a search tool on your site in minutes.
Learn More