find Halloween events for every vibe.

Pop up events in O'fallon, MO

Cats N' Mats Yoga Night - November 2025
Wed, Nov 12, 6:00 PM
Benton Park West · Tenth Life Cat Rescue
Cats N' Mats Yoga Night - November 2025
Wed, Nov 12, 6:00 PM
Benton Park West · Tenth Life Cat Rescue
5th Annual Country Christmas Craft and Vendor Event
Sat, Dec 6, 10:00 AM + 1 more
O'Fallon · O'Fallon Elks Lodge
5th Annual Country Christmas Craft and Vendor Event
Sat, Dec 6, 10:00 AM + 1 more
O'Fallon · O'Fallon Elks Lodge
Sales end soon
Brokers Connect
Tomorrow at 5:30 PM
Midtown · City Foundry STL
Sales end soon
Brokers Connect
Tomorrow at 5:30 PM
Midtown · City Foundry STL
Just added!
Slo Down’s Haunted Lanes Costume Party
Wed, Oct 29, 6:00 PM
Richmond Heights · Tropicana Lanes
Just added!
Slo Down’s Haunted Lanes Costume Party
Wed, Oct 29, 6:00 PM
Richmond Heights · Tropicana Lanes
UMSL Takedown | Fighter 6, 2XKO, or Tekken 8 Competition | CASH PRIZE POT!
Thu, Oct 23, 5:00 PM
Woodstock · Millennium Student Center
UMSL Takedown | Fighter 6, 2XKO, or Tekken 8 Competition | CASH PRIZE POT!
Thu, Oct 23, 5:00 PM
Woodstock · Millennium Student Center
Zine Make & Swap: Alt Folding Techniques with Phoebe Santalla!
Thu, Nov 13, 6:00 PM
Lake Junction · Betty's Books
Zine Make & Swap: Alt Folding Techniques with Phoebe Santalla!
Thu, Nov 13, 6:00 PM
Lake Junction · Betty's Books
Sales end soon
WORDUP! Open Mic
Today at 7:00 PM + 11 more
Forest Park Southeast · 4193 Manchester Ave
Sales end soon
WORDUP! Open Mic
Today at 7:00 PM + 11 more
Forest Park Southeast · 4193 Manchester Ave
CWE Halloween Party
Sat, Oct 25, 11:00 AM
Central West End · Central West End
CWE Halloween Party
Sat, Oct 25, 11:00 AM
Central West End · Central West End
Bourbon Friday // Networking & Bourbon Tasting
Fri, Oct 24, 4:00 PM
Central West End · TechArtista CWE
Bourbon Friday // Networking & Bourbon Tasting
Fri, Oct 24, 4:00 PM
Central West End · TechArtista CWE
Sales end soon
PMP Live Instructor Led Certification Training Lake Saint Louis, MO
Saturday at 9:00 AM + 9 more
Lake St. Louis · Lake Saint Louis
Sales end soon
PMP Live Instructor Led Certification Training Lake Saint Louis, MO
Saturday at 9:00 AM + 9 more
Lake St. Louis · Lake Saint Louis
Sales end soon
PMP Live Instructor Led Certification Training Dardenne Prairie, MO
Saturday at 9:00 AM + 9 more
Dardenne Prairie · Dardenne Prairie
Sales end soon
PMP Live Instructor Led Certification Training Dardenne Prairie, MO
Saturday at 9:00 AM + 9 more
Dardenne Prairie · Dardenne Prairie
AI & Trade Wars: Shaping the Future of Global Supply Chains
Wed, Nov 5, 8:30 AM
Missouri · Washington University's Olin Business School
AI & Trade Wars: Shaping the Future of Global Supply Chains
Wed, Nov 5, 8:30 AM
Missouri · Washington University's Olin Business School
THE BIGGEST HALLOWEEN BASH IN DA' LOU
Fri, Oct 31, 7:00 PM
Spanish Lake · 12117 Bellefontaine Rd
THE BIGGEST HALLOWEEN BASH IN DA' LOU
Fri, Oct 31, 7:00 PM
Spanish Lake · 12117 Bellefontaine Rd
Sales end soon
PMP Live Instructor Led Certification Training Bootcamp Bridgeton, MO
Saturday at 9:00 AM + 9 more
Natural Bridge Junction · Bridgeton
Sales end soon
PMP Live Instructor Led Certification Training Bootcamp Bridgeton, MO
Saturday at 9:00 AM + 9 more
Natural Bridge Junction · Bridgeton
Statement Jewelry Class: Let's take your jewelry making to the next level!
Sun, Nov 2, 10:00 AM
Frenchtown · Moonumental Jewelry Emporium & Makerspace
Statement Jewelry Class: Let's take your jewelry making to the next level!
Sun, Nov 2, 10:00 AM
Frenchtown · Moonumental Jewelry Emporium & Makerspace
Just added!
Trunk or Treat - 5th Annual!
Sat, Oct 25, 4:00 PM
Windsor Springs · 3880 S Lindbergh Blvd
Just added!
Trunk or Treat - 5th Annual!
Sat, Oct 25, 4:00 PM
Windsor Springs · 3880 S Lindbergh Blvd

Trends in O'fallon

Explore more trends

Cats N' Mats Yoga Night - November 2025

Cats N' Mats Yoga Night - November 2025

5th Annual Country Christmas Craft and Vendor Event

5th Annual Country Christmas Craft and Vendor Event

Brokers Connect

Brokers Connect

Slo Down’s Haunted Lanes Costume Party

Slo Down’s Haunted Lanes Costume Party

UMSL Takedown | Fighter 6, 2XKO, or Tekken 8 Competition | CASH PRIZE POT!

UMSL Takedown | Fighter 6, 2XKO, or Tekken 8 Competition | CASH PRIZE POT!

Zine Make & Swap: Alt Folding Techniques with Phoebe Santalla!

Zine Make & Swap: Alt Folding Techniques with Phoebe Santalla!

WORDUP! Open Mic

WORDUP! Open Mic

CWE Halloween Party

CWE Halloween Party

Bourbon Friday // Networking & Bourbon Tasting

Bourbon Friday // Networking & Bourbon Tasting

PMP Live Instructor Led Certification Training Lake Saint Louis, MO

PMP Live Instructor Led Certification Training Lake Saint Louis, MO

PMP Live Instructor Led Certification Training Dardenne Prairie, MO

PMP Live Instructor Led Certification Training Dardenne Prairie, MO

AI & Trade Wars: Shaping the Future of Global Supply Chains

AI & Trade Wars: Shaping the Future of Global Supply Chains

THE BIGGEST HALLOWEEN BASH IN DA' LOU

THE BIGGEST HALLOWEEN BASH IN DA' LOU

PMP Live Instructor Led Certification Training Bootcamp Bridgeton, MO

PMP Live Instructor Led Certification Training Bootcamp Bridgeton, MO

Statement Jewelry Class: Let's take your jewelry making to the next level!

Statement Jewelry Class: Let's take your jewelry making to the next level!

Trunk or Treat - 5th Annual!

Trunk or Treat - 5th Annual!

Things to do around O'fallon

Trends in O'fallon

1. Events happening today near me

2. Trunk or treat

3. Car shows

4. October

5. Crafts fair

6. Halloween party

7. Scramble golf tournaments

8. Job fairs

9. Kids

10. Puppy yoga

11. Puff and paint

12. Music bingo