The Cathedral of Saint Mary of the Immaculate Conception
Peoria, Illinois
Last updated September 2026
1,000-5,000
estimated members
This is likely one of 18 Catholic congregations in Peoria County, IL. Catholic accounts for 8% of the county's 240 congregations.
This estimate comes from ARDA 2020 data for churches of this size and denomination in the county.
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