Our beautiful parish has a 150 year history here in O’Fallon! I invite you to join us, as a visitor or as a member of our loving parish family, as we continue that history of striving to follow Christ. I hope this website can answer your immediate questions, but you are always welcome to contact us personally, or better yet, to stop in for a visit to find Christ here... and bring Christ to the world.
Peace, Fr. Nick
Saturday Vigil: 5pm Sunday: 8am, 10am, 12-Noon, 5:30pm Monday-Friday: 6:30am, 8am & Saturday: 8am
Holy Day’s Vigil for Feast: 5:30pm Feast Day: 6:30am, 8am and 7pm
Parish Office Closed: On Friday, July 4th in observance of Independence Day. Morning Mass and Main Street Parade Closure: There is only one morning Mass...
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Starting Tuesday, May 27, after summer officially begins, our 6:30AM and 8AM weekday Masses, and 8AM Saturday Mass, will be held in the Chapel until Labor Day. ...
Carnival rides are back at the Assumption Fall Festival, Saturday, Oct. 4 from 2-11PM and Sunday, Oct. 5 from 11AM-5PM. Save the date and be sure to join us for one of ou...
The 25th Annual Men's Group Golf Tournament is SOLD OUT, and all 36 teams are ready to play, but you can still support Catholic education by sponsoring the event!&nbs...
Win a Quilt-of-the-Month! The Assumption Quilters are hosting a quilt raffle with 12 different drawings beginning August 2025 thru July 2026. All proceeds for the Qu...
We now have an Assumption Chapel Endowment Fund! Just like our houses, God’s house also needs work to keep it maintained and looking nice. Here are a few t...