St. Mary's Institute of O'Fallon

Fort Zumwalt Park is a park in O'Fallon, Missouri, that features the rebuilt homestead fort of Jacob Zumwalt. The park's total area is 48 acres (19 ha) with 4-acre (1.6 ha) Lake Whetsel, a picnic pavilion, a shelter house, and a children's playground with equipment. The lake is open for fishing from February though October (7 am–7 pm). Fort Zumwalt Park hosts O'Fallon's annual Celebration of Lights, a drive-through display of light decorations, every Christmas season, and is home to the St. Charles Model Railroad Club. The site also includes the Darius Heald Home. Formerly a state park since 1939, the State of Missouri sold the property to the City of O'Fallon in 1978 for one dollar. The Heald Home was restored in 2001, and reconstruction of Zumwalt's fort was completed in 2015.

CarShield Field, formerly T.R. Hughes Ballpark, is a stadium in O'Fallon, Missouri. It is primarily used for baseball, and was the home field of the River City Rascals Frontier League baseball team, until the team folded and ceased operations at the end of the 2019 season. Beginning in 2020, it became the home field for the O'Fallon Hoots of the Prospect League. CarShield Field became the host of the entire six–team 2020 CarShield Collegiate League upon the cancellation of the 2020 Prospect League season due to COVID-19. CarShield Field is home to a local high school baseball team, The Christian O'Fallon Eagles. It opened in 1999 with seating for 3,500 people, plus areas for 1,650 additional fans on lawn and outfield bleacher areas.

St. Dominic High School is a private Roman Catholic high school in O'Fallon, Missouri. It is located in the Roman Catholic Archdiocese of Saint Louis.

Christian High School is a private Christian high school in O'Fallon, Missouri, with many students in grades pre-K through 12. The school mascot is the Eagle and the school colors are teal, black, and white.

O'Fallon ( oh-FAL-ən) is a city in St. Charles County, Missouri, United States. It is part of the St. Louis metropolitan statistical area, located along Interstates 64 and 70 between Lake St. Louis and St. Peters. As of the 2020 census, O'Fallon had a population of 91,316, making it the most populous suburb of St. Louis, as well as the most populous municipality in St. Charles County and the 7th most populous in Missouri. O'Fallon's namesake in St. Clair County, Illinois, is also part of the St. Louis region. The two cities are one of the few pairs of same-named municipalities to be part of the same metro area.

Fort Zumwalt North High School, the first high school established in its Fort Zumwalt School District, is located in O'Fallon, Missouri. Established in 1960 as Fort Zumwalt High School, the school moved to its current location in 1976. "North" was added to the school's name when the district's second high school opened in 1987.

Fort Zumwalt South High School (FZS) is in the Fort Zumwalt School District in Saint Peters, Missouri, United States. In 1987, FZS was the second high school to be founded in the Fort Zumwalt District (after Fort Zumwalt North). Many extracurricular activities are offered, including basketball, soccer, swimming, volleyball, football, marching band, choir, National Honors Society, and other sport, academic, and arts activities. FZS participates in the A+ program.

Fort Zumwalt West High School, the third high school established in the Fort Zumwalt School District, is located in O'Fallon, Missouri. First opened for the 1998–1999 school year, the school now has an approximate enrollment of 2,000 students with an average daily attendance rate of nearly 94%.

Dardenne Township is an inactive township in St. Charles County, in the U.S. state of Missouri.Dardenne Township most likely was erected in 1818, taking its name from Dardenne Creek.

St. Paul is a city in St. Charles County, Missouri, United States. The population was 1,829 at the 2010 census.