---
type: city_events
city: ontario
country: us
timeframe: 2026-10-04/2026-10-04
events_count: 3
last_updated: '2026-10-04T08:33:40Z'
canonical: https://staging.eventindex.ai/us/ontario/today
---

# Events in Ontario today (October 4, 2026)

3 verified events. Data refreshed daily. Source: EventIndex.ai — the open events layer for AI.

## Performing Arts
- **Gina Brillon at Improv Comedy Club - Ontario |… | NightOut** · Sun Oct 4, 00:30 · Improv Comedy Club - Ontario · [details](https://staging.eventindex.ai/us/ontario/e/gina-brillon-at-improv-comedy-club-ontario-nightout-evt_RYgnhnuh) · [tickets](https://nightout.com/events/v/gina-brillon-improv-comedy-club-ontario-ontario-2026-10-03-v-7587582/tickets)
- **Jesus Trejo Tickets, Ontario | Oct 4** · Sun Oct 4, 21:00 · Improv Comedy Club - Ontario · [details](https://staging.eventindex.ai/us/ontario/e/jesus-trejo-tickets-ontario-oct-4-evt_7D4BYhNr) · [tickets](https://nightout.com/events/v/jesus-trejo-improv-comedy-club-ontario-ontario-2026-10-04/tickets)

## Sports
- **Ontario Reign vs. Coachella Valley Firebirds - Toyota Arena - Ontario** · Sat Oct 3–Sun Oct 4, 21:00 · Toyota Arena - Ontario, 4000 Ontario Center · [details](https://staging.eventindex.ai/us/ontario/e/ontario-reign-vs-coachella-valley-firebirds-toyota-arena-ont-evt_JEGJMh7g) · [tickets](https://www.eventticketscenter.com/ontario-reign-vs-coachella-valley-firebirds-ontario-10-03-2026/8119054/t)

## Free events
No free events listed in Ontario today (October 4, 2026).

Every page on this site is also available as markdown: append `.md` to the URL. Full API: https://staging.eventindex.ai/openapi.json