Where is O'Fallon, Missouri, USA?

Written and fact-checked by | Reviewed by WhereIG Editorial Team | Last updated: August 14, 2026, 18:45 ET

Where is O'Fallon Located? - O'Fallon is a city located in the St. Charles County of Missouri, United States. O'Fallon lies between 39.2533328 Degrees North latitudes and 114.874248 Degrees West longitudes.

Location Map of O'Fallon, Missouri

Where is O'Fallon, Missouri

O'Fallon Map, Missouri, USA

Where is O'Fallon?: The Google Map showing the location of O'Fallon in the U.S. state of Missouri.

Where is O'Fallon Located?

O'Fallon is a city located in the St. Charles County of Missouri, United States. O'Fallon lies between 39.2533328 Degrees North latitudes and 114.874248 Degrees West longitudes. According to 2020 U.S.census, the population of O'Fallon city is 91316 people and the city has a total area of 29.78 sq mi. The city has numerous parks and recreational facilities.

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O'Fallon, Missouri Quick Facts

AttributeInformation
CityO'Fallon
CountySt. Charles County
StateMissouri
State CapitalJefferson City
US RegionMidwest (West North Central)
Latitude38.8106° N
Longitude90.6998° W
Elevation499 ft (152 m)
Land Area29.16 sq mi
Water Area0.10 sq mi
Total Area29.26 sq mi
Population (2020 Census)91,316
Population DensityApproximately 3,132 per sq mi
ZIP Codes63366, 63368
Area Code636
Time Zone StandardCentral Standard Time (CST, UTC−6)
Time Zone DaylightCentral Daylight Time (CDT, UTC−5)
CurrencyUnited States Dollar (USD)
FIPS Code29-54074
Congressional DistrictMissouri's 3rd Congressional District

Transportation and Connectivity in O'Fallon

CategoryInformation
Airport NameSt. Louis Lambert International Airport
IATA CodeSTL
Nearest Regional AirportSpirit of St. Louis Airport
Major HighwaysInterstate 70, Interstate 64, Missouri Route 364, Missouri Route 94
Rail ServiceFreight rail service available in St. Charles County
Public TransitSt. Charles County transportation services
Regional ConnectionsSt. Louis metropolitan area access
  • O'Fallon is a city located in St. Charles County, Missouri, in the western suburbs of St. Louis.
  • The city is one of the largest communities in the St. Louis metropolitan area and has experienced significant suburban growth.
  • O'Fallon was founded in the nineteenth century and developed from an agricultural settlement into a modern suburban city.
  • The city is known for its parks, family-friendly neighborhoods, schools, and proximity to major transportation routes.

Top Places to Visit in O'Fallon, Missouri

Landmark NameType
Fort Zumwalt ParkHistoric Park and Recreation Area
Fort Zumwalt LakeLake and Outdoor Recreation Area
Ozzie Smith Sports ComplexSports Facility
Sports Park of O'FallonSports and Recreation Complex
Alligator Creek Aquatic CenterWater Recreation Facility
City Hall ParkCommunity Park
Katy Trail State ParkTrail and Outdoor Recreation Area
Quail Ridge ParkCounty Park
Historic Main Street St. CharlesHistoric District
Augusta Wine CountryScenic and Cultural Area

Driving Distances from O'Fallon, Missouri to Nearby Cities

CityStateDistance (mi)Approx. Drive Time
St. CharlesMissouri815 minutes
St. LouisMissouri3545 minutes
ChesterfieldMissouri2030 minutes
FlorissantMissouri3040 minutes
Jefferson CityMissouri1101 hour 45 minutes
ColumbiaMissouri1151 hour 45 minutes
SpringfieldMissouri2203 hours 15 minutes
Kansas CityMissouri2403 hours 30 minutes
MemphisTennessee2854 hours 15 minutes
IndianapolisIndiana2604 hours

Colleges and Universities Near O'Fallon, Missouri

Institution NameTypeLevelNotable For
St. Charles Community CollegePublicCommunity CollegeAssociate degrees, career training, and transfer programs
Lindenwood UniversityPrivateUniversityBusiness, education, arts, athletics, and professional studies
University of Missouri–St. LouisPublicUniversityResearch, business, education, and sciences
Maryville UniversityPrivateUniversityHealth sciences, business, technology, and professional programs
Washington University in St. LouisPrivateUniversityResearch, medicine, engineering, and academics

Waterbodies Near O'Fallon, Missouri

Fort Zumwalt Lake, Dardenne Creek, Peruque Creek, Missouri River, and nearby lakes and waterways of St. Charles County.

Stadiums and Sports Facilities Near O'Fallon

Ozzie Smith Sports Complex, Sports Park of O'Fallon, CarShield Field, Fort Zumwalt School District athletic facilities, and nearby St. Louis-area sports venues.

O'Fallon, Missouri — Key Historical Facts

  • O'Fallon was founded in 1856 and named after John O'Fallon, a prominent St. Louis businessman and philanthropist.
  • The community developed as a small agricultural settlement along important transportation routes in St. Charles County.
  • The arrival of rail service helped support the growth of O'Fallon's early economy and population.
  • O'Fallon expanded rapidly during the late twentieth century as suburban development spread west from St. Louis.
  • The city became one of the fastest-growing communities in Missouri due to residential development, business growth, and regional connectivity.
  • Today, O'Fallon is recognized for its parks, recreational facilities, schools, historic areas, and role as a major St. Louis suburban community.

References

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