O'Fallon, Illinois | |
|---|---|
 The Illinois Central Railroad Downtown Caboose | |
 Flag  Seal  | |
| Nickname: "O-Town" | |
 Location of O'Fallon in St. Clair County, Illinois. | |
| Coordinates: 38°35′46″N 89°54′56″W / 38.59611°N 89.91551°W | |
| Country |  United States |
| State |  Illinois |
| County | St. Clair |
| Township | O'Fallon |
| Government | |
| • Type | Home rule[1] |
| • Mayor | Herb Roach |
| Area | |
| • Total | 15.71 sq mi (40.67 km2) |
| • Land | 15.59 sq mi (40.39 km2) |
| • Water | 0.11 sq mi (0.29 km2) |
| Elevation | 541 ft (165 m) |
| Population (2020) | |
| • Total | 32,289 |
| • Density | 2,070.60/sq mi (799.48/km2) |
| Time zone | UTC−6 (CST) |
| • Summer (DST) | UTC−5 (CDT) |
| ZIP code(s) | 62269 |
| Area code | 618 |
| FIPS code | 17-55249 |
| GNIS feature ID | 2395302[3] |
| Wikimedia Commons | O'Fallon, Illinois |
| Website | ofallon |
O'Fallon is a city in St. Clair County, Illinois, United States. The 2020 census listed the population at 32,289. The city is the second largest city in the Metro East region of the St. Louis metropolitan area and Southern Illinois. It sits 5 miles (8.0 km) from Scott Air Force Base and 18 miles (29 km) from Downtown St. Louis.
Like its namesake in St. Charles County, Missouri, O'Fallon is part of the St. Louis metro area. This makes O'Fallon (along with the two Troys in Illinois and Missouri) one of the few pairs of like-named municipalities to be part of the same metro region.
- ^ "Form of Government City of O'Fallon". City of O'Fallon, IL. Retrieved December 13, 2019.
- ^ "2020 U.S. Gazetteer Files". United States Census Bureau. Retrieved March 15, 2022.
- ^ a b U.S. Geological Survey Geographic Names Information System: O'Fallon, Illinois