O’Fallon /oʊˈfælən/ is a city along Interstate 70 and Interstate 64 between Lake St. Louis and St. Peters in Saint Charles County, Missouri. It is part of the St. Louis Metropolitan Statistical Area. As of the 2010 census O’Fallon had a population of 79,329, making the city the largest municipality in St. Charles County and seventh largest in the state of Missouri. In 2006 Money Magazine named O’Fallon as one of its “Best 100 Places to Live.” (39 out of 100) Money Magazine also ranked O’Fallon 68 out of 100 in 2008  and 26 out of 100 in 2010.
O’Fallon is the home of the River City Rascals independent Frontier League baseball team. The Rascals play at T.R. Hughes Ballpark in O’Fallon, which was built in 1999. It is located on Tom Ginnever Boulevard and T.R. Hughes Boulevard near downtown.
- Civic Park – A 20 acres (81,000 m2) park featuring Alligator’s Creek Aquatic Center and Civic Hall.
- Dames Park – A 59 acres (240,000 m2) sports park with three football fields and a fitness course.
- Fort Zumwalt Park – A 47.5 acres (192,000 m2) park featuring a fishing lake, playgrounds and historic Fort Zumwalt.
- Knaust Park – A 6 acres (24,000 m2) park with a playground and walking path.
- O’Fallon Sports Park – A 95 acres (380,000 m2) soccer complex with 12 fields playgrounds and concessions. Also home to the Renaud Spirit Center.
- Ozzie Smith Sports Complex – A 76 acres (310,000 m2) baseball/softball complex with seven diamonds and the St. Charles Co. Amateur Sports Hall of Fame. Adjacent to the T.R. Hughes Ballpark.
- Westhoff Park – A 65 acres (260,000 m2) park featuring baseball diamonds, sand volleyball courts, horseshoe pits, basketball courts, tennis and handball courts, and a skate park.
Population: 81,979 (2012)
Zip Codes: 63366, 63368
School Districts: Francis Howell, Ft. Zumwalt, Wentzville
Median Sales Price: $187,431