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Excitement About O'fallonTable of ContentsExcitement About O'fallon AddressThe Only Guide for O'fallon AddressO'fallon Il Things To Know Before You BuyThe Only Guide to O'fallon AttractionThe 6-Minute Rule for O'fallon WeatherClair Area, Illinois, which has a current populace of 6,800 people. The community is close to St. Louis, Missouri, and is lo