St. Mary's Catholic Church
Alton, Illinois
Last updated September 2026
1,000-5,000
estimated members
This is likely one of 20 Catholic congregations in Madison County, IL. Catholic accounts for 32% of the county's 347 congregations.
This estimate comes from ARDA 2020 data for churches of this size and denomination in the county.
Nearby churches in Alton
St. John Missionary Baptist Church
900 ftBaptist
405 E 4th St
Trinitarian church
0.2 miNon-Denominational
E 3rd St
El-Bethel Church
0.2 miNon-Denominational
702 Henry St
Grace United Methodist Church
0.2 miMethodist
702 Henry St
New Life Fellowship Center
0.2 miNon-Denominational
701 Henry St
Bethesda Temple Church
0.3 miNon-Denominational
512 Spring St
Explore more
Continue on BibleTimes
Free scholarly tools for reading and studying Scripture.
Read the BibleRead any passage in the King James Version with cross-references and scholarly notes.Verse of the DayA passage each day, with context and tradition readings.Bible Study LibraryPericopes, doctrine, sacraments, and figures with scholarly context.About Catholic beliefsWhat catholic churches believe, their history, and how they compare.