What's happening in Ontario tonight?

Find live events in Ontario tonight (Monday, May 18, 2026), including concerts, comedy shows, theater, and more on VenuNite.

Where can I find things to do tonight in Ontario, California?

VenuNite lists tonight's events from venues across Ontario. Browse by venue or event type to find what's happening near you tonight.

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Monday, May 18, 2026

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Things to Do Tonight in Ontario, California — Concerts, Comedy & Live Events