Introduction

The City of O’Fallon is located in the western portion of Southwestern Illinois, 15 minutes from St. Louis, Missouri. The City is comprised of 13 square miles and 3 interchanges.

O’Fallon is the fastest growing city in St. Clair County, and is the newest technology growth corridor in the St. Louis Metropolitan Area.

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. O’Fallon is known as a pro-business community and our dedicated staff proves it.