Free Events and Things to do in O'Fallon, MO

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Miltenyi Biotec & 10x Genomics Neuroscience Seminar
Thu, Jun 18, 9:30 AM
St. Louis · Washington University, Jeffrey T. Fort Neuroscience Research Building, Room 1101
Miltenyi Biotec & 10x Genomics Neuroscience Seminar
Thu, Jun 18, 9:30 AM
St. Louis · Washington University, Jeffrey T. Fort Neuroscience Research Building, Room 1101
Going fast
Community Collaboration Lab: Let’s Build Our Food Future Together
Wednesday at 3:00 PM
Alton · The Wedge Innovation Center
Going fast
Community Collaboration Lab: Let’s Build Our Food Future Together
Wednesday at 3:00 PM
Alton · The Wedge Innovation Center
Pride Month Lunch & Learn with PROMO Missouri
Wed, Jun 17, 12:00 PM
St. Louis · The Showroom at CIC St. Louis - 20 S Sarah
Pride Month Lunch & Learn with PROMO Missouri
Wed, Jun 17, 12:00 PM
St. Louis · The Showroom at CIC St. Louis - 20 S Sarah
How to Apply to SLICE
Sat, Jun 6, 12:00 PM
St. Louis · 3745 Foundry Way
How to Apply to SLICE
Sat, Jun 6, 12:00 PM
St. Louis · 3745 Foundry Way
Summer AI Learnathon
Fri, Jun 5, 8:30 AM
Alton · The Wedge Innovation Center
Summer AI Learnathon
Fri, Jun 5, 8:30 AM
Alton · The Wedge Innovation Center
SLICE and SLPC Sip & Scribe - May
Sat, May 30, 12:00 PM
St. Louis · High Low
SLICE and SLPC Sip & Scribe - May
Sat, May 30, 12:00 PM
St. Louis · High Low
Community Day 2026
Sat, Sep 26, 10:00 AM
St. Louis · The Hub
Community Day 2026
Sat, Sep 26, 10:00 AM
St. Louis · The Hub
Park2Park: A Day of Remembrance One Year After
Tomorrow at 9:00 AM
St. Louis · O'Fallon Park
Park2Park: A Day of Remembrance One Year After
Tomorrow at 9:00 AM
St. Louis · O'Fallon Park
Reading is Fire
Sat, Jun 13, 11:00 AM
St. Louis · Ritz Park
Reading is Fire
Sat, Jun 13, 11:00 AM
St. Louis · Ritz Park
St Louis African Restaurant Week 2025
Thursday at 12:00 PM
St Louis · St Louis
St Louis African Restaurant Week 2025
Thursday at 12:00 PM
St Louis · St Louis
First Friday: Closing Reception for Dialogues & Conversations
Fri, Aug 7, 5:00 PM
St. Louis · Pulitzer Arts Foundation
First Friday: Closing Reception for Dialogues & Conversations
Fri, Aug 7, 5:00 PM
St. Louis · Pulitzer Arts Foundation
Pretty Girl Summit - Dream Big
Sat, Jul 11, 3:00 PM
St. Louis · Painted Visions Events LLC
Pretty Girl Summit - Dream Big
Sat, Jul 11, 3:00 PM
St. Louis · Painted Visions Events LLC
2026 Gateway Outdoor Summit
Thu, Aug 20, 10:00 AM
St. Louis · .ZACK
2026 Gateway Outdoor Summit
Thu, Aug 20, 10:00 AM
St. Louis · .ZACK
Paul Fentress: "The Tune-Up" - Opening and Live Performance @UnionHallSTL
Fri, May 29, 6:00 PM
St. Louis · The Gallery @unionhallstl
Paul Fentress: "The Tune-Up" - Opening and Live Performance @UnionHallSTL
Fri, May 29, 6:00 PM
St. Louis · The Gallery @unionhallstl
Sales end soon
Build & Protect: Small Business Protection & Opportunity Overview
Wednesday at 6:00 PM + 36 more
St. Louis · CIC St. Louis - 20 S Sarah St.
Sales end soon
Build & Protect: Small Business Protection & Opportunity Overview
Wednesday at 6:00 PM + 36 more
St. Louis · CIC St. Louis - 20 S Sarah St.
IKAGG CONNECTions Monthly Networking Meet Up
Fri, Jun 19, 11:30 AM + 18 more
Webster Groves · Llywelyn's Pub
IKAGG CONNECTions Monthly Networking Meet Up
Fri, Jun 19, 11:30 AM + 18 more
Webster Groves · Llywelyn's Pub
Back to school Picnic
Sat, Aug 1, 12:00 AM
St. Louis · 4490 W North Dr
Back to school Picnic
Sat, Aug 1, 12:00 AM
St. Louis · 4490 W North Dr
Connect, Exchange & Thrive!
Thu, Aug 6, 4:30 PM + 1 more
St. Louis · 56 N Euclid Ave
Connect, Exchange & Thrive!
Thu, Aug 6, 4:30 PM + 1 more
St. Louis · 56 N Euclid Ave
Juneteenth Celebration
Sat, Jun 13, 10:00 AM
St. Louis · 4000 Maffitt Ave
Juneteenth Celebration
Sat, Jun 13, 10:00 AM
St. Louis · 4000 Maffitt Ave
Sales end soon
Running Niche Run Club Wednesday 6:30 PM Group Run
Wednesday at 6:30 PM + 32 more
St. Louis · Running Niche
Sales end soon
Running Niche Run Club Wednesday 6:30 PM Group Run
Wednesday at 6:30 PM + 32 more
St. Louis · Running Niche

Trends in O'Fallon

Explore more trends

Frequently asked questions about O'Fallon

What are the best free events to attend?

According to Eventbrite, the best free events are:

Miltenyi Biotec & 10x Genomics Neuroscience Seminar

Pride Month Lunch & Learn with PROMO Missouri

How to Apply to SLICE

Summer AI Learnathon

Which events are currently trending in O'Fallon?

The trending searches this month in O'Fallon are:

mothers day

carnival festival

cannabis_event

events happening today near me

Which free events are coming up?

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

Park2Park: A Day of Remembrance One Year After

Community Collaboration Lab: Let’s Build Our Food Future Together

Build & Protect: Small Business Protection & Opportunity Overview

Running Niche Run Club Wednesday 6:30 PM Group Run

Miltenyi Biotec & 10x Genomics Neuroscience Seminar

Miltenyi Biotec & 10x Genomics Neuroscience Seminar

Community Collaboration Lab: Let’s Build Our Food Future Together

Community Collaboration Lab: Let’s Build Our Food Future Together

Pride Month Lunch & Learn with PROMO Missouri

Pride Month Lunch & Learn with PROMO Missouri

How to Apply to SLICE

How to Apply to SLICE

Summer AI Learnathon

Summer AI Learnathon

SLICE and SLPC Sip & Scribe - May

SLICE and SLPC Sip & Scribe - May

Community Day 2026

Community Day 2026

Park2Park: A Day of Remembrance One Year After

Park2Park: A Day of Remembrance One Year After

Reading is Fire

Reading is Fire

St Louis African Restaurant Week 2025

St Louis African Restaurant Week 2025

First Friday: Closing Reception for Dialogues & Conversations

First Friday: Closing Reception for Dialogues & Conversations

Pretty Girl Summit - Dream Big

Pretty Girl Summit - Dream Big

2026 Gateway Outdoor Summit

2026 Gateway Outdoor Summit

Paul Fentress: "The Tune-Up" - Opening and Live Performance @UnionHallSTL

Paul Fentress: "The Tune-Up" - Opening and Live Performance @UnionHallSTL

Build & Protect: Small Business Protection & Opportunity Overview

Build & Protect: Small Business Protection & Opportunity Overview

IKAGG CONNECTions Monthly Networking Meet Up

IKAGG CONNECTions Monthly Networking Meet Up

Back to school Picnic

Back to school Picnic

Connect, Exchange & Thrive!

Connect, Exchange & Thrive!

Juneteenth Celebration

Juneteenth Celebration

Running Niche Run Club Wednesday 6:30 PM Group Run

Running Niche Run Club Wednesday 6:30 PM Group Run

Things to do around O'Fallon

Trends in O'Fallon

1. Mothers day

2. Carnival festival

3. Cannabis_event

4. Events happening today near me

5. Mothers day brunch

6. Car shows

7. Scramble golf tournaments

8. Kids

9. Goat yoga

10. Bingo

11. Music bingo

12. Couples

What are the best free events to attend?

Which events are currently trending in O'Fallon?

Which free events are coming up?