An Unbiased View of O'fallon Zip CodeTable of ContentsThe O'fallon Parking PDFsThe 30-Second Trick For O'fallon Zip CodeIndicators on O'fallon Location You Should KnowNot known Facts About O'fallonO'Fallon is a city in St. Clair County, Illinois, which was started in 1854. O'Fallon's namesake comes from Colonel John O'Fallon, who was a well-off gen… Read More