Find events happening in O Fallon https://allevents.in Rail District Festival Civic Park, 463 Civic Park Dr, O'Fallon, MO 63366, United States, O Fallon https://allevents.in/o-fallon/rail-district-festival/200030411487740 Customer Appreciation BBQ hosted by Allied Painting Contractors City Hall Park, 2032 Hanley Road, O'Fallon, United States https://allevents.in/ofallon/customer-appreciation-bbq-hosted-by-allied-painting-contractors/100001992180772318 Duckfest 2026 1270 Church Rd., St. Paul, MO, United States, Missouri 63366, 1270 Church Rd, O'Fallon, MO 63366-5104, United States, O Fallon https://allevents.in/o-fallon/duckfest-2026/200029885411228 Assumption Fall Festival 403 N Main St, O'Fallon, MO, United States, Missouri 63366, 403 N Main St, O'Fallon, MO 63366-2205, United States, O Fallon https://allevents.in/o-fallon/assumption-fall-festival/200030264362132