Get to know O'Fallon
The practical stuff — trash day, town hall, schools — plus the town’s story and where to go. Kept current by neighbors.
The basics
About O'Fallon
City in Missouri, United StatesO'Fallon ( oh-FAL-ən) is a city in St. Charles County, Missouri, United States. It is part of the St. Louis metropolitan statistical area, along Interstates 64 and 70 between Lake St. Louis and St. Peters. As of the 2020 census, O'Fallon had a population of 91,316, making it St. Louis's most populous suburb as well as the most populous municipality in St. Charles County and the 7th-most populous in Missouri. O'Fallon's namesake in St. Clair County, Illinois, is also part of the St. Louis region. The two cities are one of the few pairs of same-named municipalities to be part of the same metro area.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
Browse by topic
Add a fact, a place, or a post and its topic appears here for everyone.
Town essentials
We’re gathering dependable details about town offices and local services. Facts appear here after they’ve been checked.