St.Mary Immaculate Conception Catholic church
Mount Vernon, Illinois
Address1500 N Main St
DenominationCatholic
Phone+1 618-244-1559
EmailEmail@stmarymtvernon.org
Services
Worship
Sat5:00 PM
Sun10:30 AM
Mon8:30 AM
Fri8:30 AM
Tue5:30 PM
Wed12:00 PM
Confession
Sat4:00 PM - 4:30 PM
Morning Prayer
Mon9:30 AM
Prayer Meeting
Sun10:00 AM
Tue6:15 PM
Last updated May 2026
~653
estimated members
Based on ARDA 2020 data, this is likely one of 2 Catholic congregations in Jefferson County, IL, with an average size of approximately 653 members. Catholic accounts for 8% of the county's 92 congregations.
Source: ARDA 2020 Religious Congregations & Membership Study
Nearby churches in Mount Vernon
Saint Mary's Catholic School
222 ftCatholic
1416 Main St
St Mary's Parish Center
225 ftCatholic
1500 Main St
Way of the Cross Ranch Ministries
403 ftProtestant
15882 E Knox Rd
MT Vernon Prayer Breakfast Committee
403 ftProtestant
18619 E Fairfield Rd
First United Methodist Church
0.2 miMethodist
1133 Main St
Trinity Episcopal Church
0.2 miEpiscopal