Catholic Parishes in Alton

Looking for a Catholic church near you in Alton? Browse every Catholic parish in Alton, Illinoiswith Sunday Mass times, weekday Mass schedules, confession (reconciliation) availability, and contact info. The interactive map shows each parish location so you can quickly find the closest Catholic church; the filter bar lets you narrow by Mass day, language, or confession availability — whether you're looking for an early-morning Sunday Mass, a Saturday vigil, or a Spanish-speaking parish.