Events in Ontario — September 2026

Frequently Asked Questions

What's happening in Ontario in September 2026?

There are 22 events in Ontario, California in September 2026, including Ontario Tower Buzzers vs. Rancho Cucamonga Quakes at ONT Field (6:35 PM), Ontario Tower Buzzers vs. Rancho Cucamonga Quakes at ONT Field (6:35 PM), Leonard Ouzts at Ontario Improv (8:00 PM), Ontario Tower Buzzers vs. Rancho Cucamonga Quakes at ONT Field (6:35 PM). Browse the full September 2026 calendar on VenuNite.

Are there free things to do in Ontario in September 2026?

Yes — 22 of the listed September 2026 events in Ontario are free, including concerts, open mics, and community events. Filter by price on the list above.

How do I find events in Ontario for a specific date in September 2026?

VenuNite lists every upcoming event in Ontario, California with date filters. Use the date picker on this page to narrow September 2026 down to a single day or weekend.