Immaculate Conception

St. Louis, Illinois

DenominationCatholic
Phone(618) 669-2391

Last updated May 2026

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~2,040

estimated members

Based on ARDA 2020 data, this is likely one of 20 Catholic congregations in Madison County, IL, with an average size of approximately 2,040 members. Catholic accounts for 32% of the county's 347 congregations.

Source: ARDA 2020 Religious Congregations & Membership Study

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