City Hall Extended Operation Hours »
O’Fallon, Illinois – Beginning on April 1, 2024, City Hall will be expanding...
City Hall Closed on March 29, 2024, for Good Friday »
O’Fallon, Illinois - March 25, 2024 – In observance of Good Friday, City Hall will be...
City Facilities Delayed Opening to Public Until 10 a.m. on January 22, 2024 »
Due to inclement weather, city facilities will have a delayed opening for the public until 10 a.m. on January 22, 2024...
Welcome to the City of O'Fallon
We are a diverse, charming community of hardworking residents, including personnel from nearby Scott Air Force Base. Over 30,000 people call O'Fallon "home", and each one contributes a wonderful mix of small-town caring and community pride. O'Fallon's rich history of trade and industry, and its solid foundation for continued growth and prosperity make it one of the area's most popular communities in which to live and work. Today, O'Fallon is known as one of the fastest growing communities in the Metropolitan St. Louis area. Visit us and see what O'Fallon has to offer!