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Events and Things to do in O'fallon, MO

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SaSSy in St. Louis (A Sexy and SaSSy Signing Event)
Sat, May 30, 11:00 AM
Saint Charles · St. Charles Convention Center
SaSSy in St. Louis (A Sexy and SaSSy Signing Event)
Sat, May 30, 11:00 AM
Saint Charles · St. Charles Convention Center
Tongue & Groove | RYSE Nightclub at Ameristar Casino Resort Spa
Sun, May 17, 3:00 PM
Saint Charles · RYSE Nightclub
Tongue & Groove | RYSE Nightclub at Ameristar Casino Resort Spa
Sun, May 17, 3:00 PM
Saint Charles · RYSE Nightclub
Sales end soon
Second Annual Just GLO Up Conference
Friday at 8:00 AM
St. Peters · Old Hickory Golf Club
Sales end soon
Second Annual Just GLO Up Conference
Friday at 8:00 AM
St. Peters · Old Hickory Golf Club
Going fast
Music & Mimosa Festival
Sun, May 31, 2:00 PM
Saint Charles · The Wine Garden
Going fast
Music & Mimosa Festival
Sun, May 31, 2:00 PM
Saint Charles · The Wine Garden
Breakfast in America—A Supertramp Celebration
Fri, Jun 5, 7:00 PM
Chesterfield · Chesterfield Amphitheater
Breakfast in America—A Supertramp Celebration
Fri, Jun 5, 7:00 PM
Chesterfield · Chesterfield Amphitheater
Sales end soon
37th Annual ASHRAE STL Scholarship Golf Outing
Mon, May 18, 7:00 AM
Saint Charles · Missouri Bluffs Golf Club
Sales end soon
37th Annual ASHRAE STL Scholarship Golf Outing
Mon, May 18, 7:00 AM
Saint Charles · Missouri Bluffs Golf Club
Almost full
5/19 - St. Peters, MO - A Derby Soiree
Tue, May 19, 7:00 PM
St. Peters · 5300 N Service Rd
Almost full
5/19 - St. Peters, MO - A Derby Soiree
Tue, May 19, 7:00 PM
St. Peters · 5300 N Service Rd
Going fast
Pickleball with a Purpose: Mind the Gap STL Fundraiser
Sun, May 17, 2:00 PM
Chesterfield · Paddle Up Pickleball Club - Chesterfield
Going fast
Pickleball with a Purpose: Mind the Gap STL Fundraiser
Sun, May 17, 2:00 PM
Chesterfield · Paddle Up Pickleball Club - Chesterfield
An Evening with Alex Finlay: The Anniversary
Tue, May 19, 7:00 PM
St. Peters · St. Charles City-County Library, Spencer Road Branch
An Evening with Alex Finlay: The Anniversary
Tue, May 19, 7:00 PM
St. Peters · St. Charles City-County Library, Spencer Road Branch
2026 ILS Athletics Annual Golf Tournament
Mon, Jun 8, 9:00 AM
Saint Charles · Bogey Hills Country Club
2026 ILS Athletics Annual Golf Tournament
Mon, Jun 8, 9:00 AM
Saint Charles · Bogey Hills Country Club
2026 GSLCA Golf Tournament- The Best Golf Event of the YEAR!!
Fri, Jun 12, 8:00 AM
O'Fallon · The Falls Golf Club
2026 GSLCA Golf Tournament- The Best Golf Event of the YEAR!!
Fri, Jun 12, 8:00 AM
O'Fallon · The Falls Golf Club
Agent STC Presents: K.E.Y. Talks
Thu, May 28, 9:00 AM
St. Peters · Water's Edge Banquet Center
Agent STC Presents: K.E.Y. Talks
Thu, May 28, 9:00 AM
St. Peters · Water's Edge Banquet Center
Almost full
When Life Gives Lemons...Sip Tea
Sun, May 17, 5:00 PM
Saint Charles · Magpie's Restaurant
Almost full
When Life Gives Lemons...Sip Tea
Sun, May 17, 5:00 PM
Saint Charles · Magpie's Restaurant
Sales end soon
May 2026 - NTx NETWORKING LUNCH
Tomorrow at 12:00 PM
Saint Charles · The Commons
Sales end soon
May 2026 - NTx NETWORKING LUNCH
Tomorrow at 12:00 PM
Saint Charles · The Commons
St. Louis Speed Dating for Singles Age 25-45 ♥ Saint Charles Missouri at Chicken N Pickle
Wed, May 20, 6:30 PM
Saint Charles · Chicken N Pickle
St. Louis Speed Dating for Singles Age 25-45 ♥ Saint Charles Missouri at Chicken N Pickle
Wed, May 20, 6:30 PM
Saint Charles · Chicken N Pickle
Going fast
PAINT & SIP: Pass the Painting Challenge
Mon, Jun 22, 6:00 PM
Cottleville · Frankie Martin's Garden
Going fast
PAINT & SIP: Pass the Painting Challenge
Mon, Jun 22, 6:00 PM
Cottleville · Frankie Martin's Garden
Allegro: a St. Louis Choral Community Presents: SONGS OF THE SILVER SCREEN
Sun, May 31, 3:00 PM
Chesterfield · Purser Center at Logan University
Allegro: a St. Louis Choral Community Presents: SONGS OF THE SILVER SCREEN
Sun, May 31, 3:00 PM
Chesterfield · Purser Center at Logan University
Student Summit
Chesterfield · Undivided Experience Center
Student Summit
Chesterfield · Undivided Experience Center
An Evening with Seanan McGuire- INKPOT GODS
Mon, Jun 8, 7:00 PM
Saint Charles · St. Charles City-County Library, Kisker Road Branch
An Evening with Seanan McGuire- INKPOT GODS
Mon, Jun 8, 7:00 PM
Saint Charles · St. Charles City-County Library, Kisker Road Branch
Sales end soon
Bus To Old Rock House!
Saturday at 7:00 PM
Saint Charles · Old Millstream Inn
Sales end soon
Bus To Old Rock House!
Saturday at 7:00 PM
Saint Charles · Old Millstream Inn

Trends in O'fallon

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Frequently asked questions about O'fallon

What are the best events to attend?

According to Eventbrite, the best events are:

SaSSy in St. Louis (A Sexy and SaSSy Signing Event)

Tongue & Groove | RYSE Nightclub at Ameristar Casino Resort Spa

Music & Mimosa Festival

Breakfast in America—A Supertramp Celebration

Which events are currently trending in O'fallon?

The trending searches this month in O'fallon are:

carnival festival

events happening today near me

Which events are coming up?

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

May 2026 - NTx NETWORKING LUNCH

Second Annual Just GLO Up Conference

Bus To Old Rock House!

Pickleball with a Purpose: Mind the Gap STL Fundraiser