O'fallon Parking for Dummies Table of ContentsThe smart Trick of O'fallon Attraction That Nobody is DiscussingThe Definitive Guide to O'fallon Zip CodeThe Facts About O'fallon Parking RevealedSee This Report on O'fallonO'Fallon is a city in St. Clair Region, Illinois, which was established in 1854. O'Fallon's name comes from Colonel John O'Fallon,