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Free Events and Things to do in Ontario, CA

Search for something you love or check out popular events in your area.

Sales end soon
Monster Fest II: Downtown Pomona
Saturday at 12:00 PM
Pomona · Downtown Pomona
Sales end soon
Monster Fest II: Downtown Pomona
Saturday at 12:00 PM
Pomona · Downtown Pomona
Selling fast
Skin Clinic Medspa Black Friday Event
Fri, Nov 6, 5:00 PM
Riverside · Skin Clinic Medspa
Selling fast
Skin Clinic Medspa Black Friday Event
Fri, Nov 6, 5:00 PM
Riverside · Skin Clinic Medspa
Science Carnival 2026
Tuesday at 11:30 AM
Pomona · University Quad
Science Carnival 2026
Tuesday at 11:30 AM
Pomona · University Quad
Selling fast
Reset Faith Food Church Box Giveaway
Sat, Jan 2, 11:00 AM + 4 more
Riverside · Reset Faith Church
Selling fast
Reset Faith Food Church Box Giveaway
Sat, Jan 2, 11:00 AM + 4 more
Riverside · Reset Faith Church
Eat & Be Well Thanksgiving 2026
Wed, Nov 25, 7:00 AM
Fontana · Central City Park
Eat & Be Well Thanksgiving 2026
Wed, Nov 25, 7:00 AM
Fontana · Central City Park
Fairview Green River Fall Wedding Fair & Open House!
Wed, Oct 28, 6:00 PM
Corona · 5215 Green River Rd
Fairview Green River Fall Wedding Fair & Open House!
Wed, Oct 28, 6:00 PM
Corona · 5215 Green River Rd
Almost full
Upland Annual Trunk or Treat
Thu, Oct 29, 5:00 PM
Upland · 1945 W 9th St
Almost full
Upland Annual Trunk or Treat
Thu, Oct 29, 5:00 PM
Upland · 1945 W 9th St
Sales end soon
CARNAVAL Saturdays 18+
Saturday at 9:30 PM + 1 more
Pomona · Carnaval Nightclub
Sales end soon
CARNAVAL Saturdays 18+
Saturday at 9:30 PM + 1 more
Pomona · Carnaval Nightclub
Riverside's Biggest Veterans Celebration
Sat, Nov 14, 9:00 AM
Jurupa Valley · 5370 Mission Rock Way
Riverside's Biggest Veterans Celebration
Sat, Nov 14, 9:00 AM
Jurupa Valley · 5370 Mission Rock Way
Selling fast
Rancho Cucamonga, CA - Punch Bunch Kid's Club @ Punch Bowl Social
Sat, Jan 9, 11:00 AM + 2 more
Rancho Cucamonga · Punch Bowl Social
Selling fast
Rancho Cucamonga, CA - Punch Bunch Kid's Club @ Punch Bowl Social
Sat, Jan 9, 11:00 AM + 2 more
Rancho Cucamonga · Punch Bowl Social
Ontario, CA- Makeup Blowout Sale Event!
Fri, Feb 19, 10:00 AM
Ontario · Ontario Airport Hotel & Conference Center
Ontario, CA- Makeup Blowout Sale Event!
Fri, Feb 19, 10:00 AM
Ontario · Ontario Airport Hotel & Conference Center
Sales end soon
MEET & GREET WITH BLUEY - Kids Club at Glendora Public Market
Sunday at 2:00 PM
Glendora · Glendora Public Market
Sales end soon
MEET & GREET WITH BLUEY - Kids Club at Glendora Public Market
Sunday at 2:00 PM
Glendora · Glendora Public Market
Selling fast
Provost's Awards for Excellence Symposium
Thu, Oct 29, 3:00 PM
Pomona · California State Polytechnic University, Pomona
Selling fast
Provost's Awards for Excellence Symposium
Thu, Oct 29, 3:00 PM
Pomona · California State Polytechnic University, Pomona
Almost full
Find Your Flow: Free Wellness, Faith & Community Experience
Sat, Nov 14, 9:00 AM
Pomona · 637 N Park Ave
Almost full
Find Your Flow: Free Wellness, Faith & Community Experience
Sat, Nov 14, 9:00 AM
Pomona · 637 N Park Ave
Sales end soon
PRE HALLOWEEN BASH @ THE BASEMENT : 2 ROOMS 18+
Tomorrow at 9:30 PM
Pomona · the basement – pomona
Sales end soon
PRE HALLOWEEN BASH @ THE BASEMENT : 2 ROOMS 18+
Tomorrow at 9:30 PM
Pomona · the basement – pomona
Sales end soon
Fox Racing Warehouse Sale - Corona, CA
Tomorrow at 10:00 AM + 31 more
Corona · Alternative Retail | Corona, CA
Sales end soon
Fox Racing Warehouse Sale - Corona, CA
Tomorrow at 10:00 AM + 31 more
Corona · Alternative Retail | Corona, CA
FREE ENTRY TICKETS for The Avalanche Sale Ontario, CA, Dec. 4-6
Fri, Dec 4, 5:00 PM
Ontario · 2000 E Convention Center Way
FREE ENTRY TICKETS for The Avalanche Sale Ontario, CA, Dec. 4-6
Fri, Dec 4, 5:00 PM
Ontario · 2000 E Convention Center Way
Sales end soon
Little Willie G. Community Concert @ The Fox Theatre in Pomona
Sunday at 3:00 PM
Pomona · The Fox Theater Pomona
Sales end soon
Little Willie G. Community Concert @ The Fox Theatre in Pomona
Sunday at 3:00 PM
Pomona · The Fox Theater Pomona
Sales end soon
St. Mark's Annual Trunk or Treat
Saturday at 4:00 PM
Upland · St. Marks Episcopal Parish
Sales end soon
St. Mark's Annual Trunk or Treat
Saturday at 4:00 PM
Upland · St. Marks Episcopal Parish
Sales end soon
Arts & Sciences Carnival at California Baptist University
Saturday at 9:00 AM
Riverside · California Baptist University
Sales end soon
Arts & Sciences Carnival at California Baptist University
Saturday at 9:00 AM
Riverside · California Baptist University

Trends in Ontario

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Frequently asked questions about Ontario

What are the best free events to attend?

According to Eventbrite, the best free events are:

Skin Clinic Medspa Black Friday Event

Science Carnival 2026

Reset Faith Food Church Box Giveaway

Eat & Be Well Thanksgiving 2026

Which events are currently trending in Ontario?

The trending searches this month in Ontario are:

halloween events

mix champagne lounge

Which free events are coming up?

Discover the best free events happening soon – you don't want to miss them:

Fox Racing Warehouse Sale - Corona, CA

PRE HALLOWEEN BASH @ THE BASEMENT : 2 ROOMS 18+

Arts & Sciences Carnival at California Baptist University

Monster Fest II: Downtown Pomona