O'Fallon is a city located in St. Clair County, Illinois, US. It was incorporated in 1905 and has since grown to become the third-largest city in the Metro East region of Illinois. The city is known for its family-friendly atmosphere and quality schools. A notable attraction in O'Fallon is the Katy Trail, the longest continuous rail-trail in the country, which attracts cyclists, hikers, and nature enthusiasts from all over.
T-Mobile takes the top spot among Cell Phone Stores in O Fallon, Illinois with 2 locations as of April 29, 2024. AT&T is in second place with 1 locations.