O'Fallon, Missouri, United States

🇺🇸 O'Fallon is a city located along Interstates 64 and 70 between Lake St. Louis and St. Peters in St. Charles County, Missouri, United States. It is part of the St. Louis metropolitan statistical area. It is the largest suburb of St. Louis, as well as the largest municipality in St. Charles County and the seventh-largest in Missouri. O'Fallon's namesake in St. Clair County, Illinois, is also part of the St. Louis metropolitan statistical area. The two O'Fallons are one of the few pairs of same-named municipalities to be part of the same MSA.

History O'Fallon was founded in 1856 by Nicholas Krekel. The community was named by Krekel's older brother, Judge Arnold Krekel, after John O'Fallon, the president of the North Missouri Railroad. A post office called O'Fallon has been in operation since 1859 with its first postmaster being Nicholas Krekel. The St. Mary's Institute of O'Fallon was listed on the National Register of Historic Places in 2007.

In 2006, Money magazine named O'Fallon 39th in its "Best 100 Places to Live". The magazine also ranked O'Fallon 68th out of 100 in 2008, 26th out of 100 in 2010, and 42nd out of 100 in 2017.

Geography According to the United States Census Bureau, the city has a total area of 29.20 square miles (75.63 km²), of which 29.19 square miles (75.60 km²) are land and 0.01 square miles (0.03 km²) is covered by water.

Economy Mastercard has a major presence in O'Fallon. Venture Stores was headquartered and maintained a distribution centre in O'Fallon, until its dissolution. The buildings are now occupied by True Manufacturing. Air Evac Lifeteam, a medical helicopter service for the rural areas of the Ozarks, moved its headquarters to O'Fallon in 2015.

Sports O'Fallon was the home of the River City Rascals independent Frontier League baseball team. The Rascals played at CarShield Field in O'Fallon, which was built in 1999. It is located on Tom Ginnever Boulevard and T.R. Hughes Boulevard near downtown. The organization ceased operations after the 2019 season. The O'Fallon Hoots and the CarShield Collegiate League now play at the stadium.

Parks and recreation • Civic Park, a 20-acre (8.1 ha) park, it features Alligator's Creek Aquatic Center, a bandstand and amphitheater. • Dames Park is a 59-acre (24 ha) sports park with three football fields and a fitness course. • Fort Zumwalt Park is a 47.5-acre (19.2 ha) park featuring a fishing lake, a disc golf course, playgrounds, and historic Fort Zumwalt. • Knaust Park is a 6-acre (24,000 m²) park with a playground and walking path. • O'Fallon Sports Park is a 95-acre (38 ha) soccer complex with 12 fields, playgrounds, and concessions. It is also home to the Renaud Spirit Center. • Ozzie Smith Sports Complex is a 76-acre (31 ha) baseball/softball complex with seven diamonds, adjacent to CarShield Field. • Westhoff Park is a 65-acre (26 ha) park featuring baseball diamonds, sand volleyball courts, horseshoe pits, basketball courts, tennis and handball courts, and a skate park.