Saint Nicholas Roman Catholic Church
O Fallon, Illinois
Last updated September 2026
1,000-5,000
estimated members
This is likely one of 26 Catholic congregations in St. Clair County, IL. Catholic accounts for 29% of the county's 313 congregations.
This estimate comes from ARDA 2020 data for churches of this size and denomination in the county.
Nearby churches in O Fallon
Blessed Savior Lutheran Church
0.7 miLutheran
1205 N Lincoln Ave
Our Savior's Lutheran Church
0.7 miLutheran
O'Fallon United Church of Christ
0.8 miUnited Church of Christ
Faith United Baptist Church - The Faith House
0.8 miBaptist
112 W Washington St
Saint Nicholas Good Shepherd Center
1.0 miCatholic
214 W 3rd St
O'Fallon Apostolic Assembly
1.0 miPentecostal
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