Events in O'Fallon — August 2026

Frequently Asked Questions

What's happening in O'Fallon in August 2026?

There are 21 events in O'Fallon, Illinois in August 2026, including O & S Soccer for Pre-K to 4th Grade Begins at Katy Cavins Community Center, Vine Street Market at The Station, One on One Swim Lessons at Katy Cavins Community Center, Summer Camp – 3, 2, 1, Camp's Out at Katy Cavins Community Center. Browse the full August 2026 calendar on VenuNite.

Are there free things to do in O'Fallon in August 2026?

Yes — 21 of the listed August 2026 events in O'Fallon are free, including concerts, open mics, and community events. Filter by price on the list above.

How do I find events in O'Fallon for a specific date in August 2026?

VenuNite lists every upcoming event in O'Fallon, Illinois with date filters. Use the date picker on this page to narrow August 2026 down to a single day or weekend.