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The 9-Minute Rule for O'fallon LocationTable of ContentsA Biased View of O'fallon IlSome Known Factual Statements About O'fallon Map Excitement About O'fallon LocationThe Only Guide to O'fallon ParkingO'Fallon is a city in St. Clair Region, Illinois, which was started in 1854. O'Fallon's namesake originates from Colonel John O'Fallon, who was a wel