About Us:

In 2006, O'Fallon celebrated the 150th anniversary of its founding—its Sesquicentennial. During the 1956 O'Fallon centennial celebration, more than half our citizens turned out, and more than three times our population at that time attended and took part in a very big weekend. By the time we celebrated our Sesquicentennial in 2006, we were a community of over 70,000 people, and new and old residents alike had an opportunity to build O'Fallon's sense of community by sharing its history.