In the fantastic area of O'Fallon you’ll be in good company with around 34,086 residents with around 68% of those homeowners. With an average age of 38, the residents of O'Fallon are well established, made up of families of all age groups. Though fairly kicked back throughout the week, during weekends and holidays, you can see a lot more activity and excitement. Over the past 30 days roughly 52 homes have been sold with an average sold price of $398,062. That is an increase of $49,965 from the previous period.