St. John's Cathedral
Quincy, Illinois
Located in Quincy, Illinois, this Catholic cathedral serves the local community and welcomes visitors of all backgrounds. As part of the Roman Catholic Church, St. John's Cathedral is centered on the celebration of the Eucharist and the sacraments, which form the foundation of Catholic worship and spiritual life. Visitors can expect a traditional liturgical service that follows the structure of the Latin Mass or contemporary Catholic liturgy, depending on the time of service. The cathedral provides opportunities for confession, prayer, and religious education. Catholic churches emphasize community service, charitable work, and devotion to Mary and the saints. Regular Mass schedules accommodate different times throughout the week, making it accessible for those seeking daily or weekly worship. The cathedral typically features religious artwork, stained glass windows, and a reverent atmosphere conducive to prayer and reflection.
Last updated May 2026
1,000-5,000
estimated members
This is likely one of 9 Catholic congregations in Adams County, IL. Catholic accounts for 31% of the county's 109 congregations.
This estimate comes from ARDA 2020 data for churches of this size and denomination in the county.
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