Civic Park | A 20-acre (81,000 m2) park featuring Alligator's Creek Aquatic Center and Civic Hall.
Dames Park | A 59-acre (240,000 m2) sports park with three football fields and a fitness course.
Fort Zumwalt Park | A 47.5-acre (192,000 m2) park featuring a fishing lake, a disc golf course, playgrounds and historic Fort Zumwalt.
Knaust Park | A 6-acre (24,000 m2) park with a playground and walking path.
O'Fallon Sports Park | A 95-acre (380,000 m2) soccer complex with 12 fields playgrounds and concessions. Also home to the Renaud Spirit Center.
Ozzie Smith Sports Complex | A 76-acre (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-acre (260,000 m2) park featuring baseball diamonds, sand volleyball courts, horseshoe pits, basketball courts, tennis and handball courts, and a skate park.