Map of O’Fallon city, Missouri

O’Fallon (/oʊˈfælən/ 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 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 region. The two cities are one of the few pairs of same-named municipalities to be part of the same metro area.

O’Fallon city overview:
Name:O’Fallon city
LSAD Code:25
LSAD Description:city (suffix)
State:Missouri
County:St. Charles County
Incorporated:September 25, 1912
Elevation:541 ft (165 m)
Land Area:30.50 sq mi (79.00 km²)
Water Area:0.00 sq mi (0.01 km²)
Population Density:2,993.67/sq mi (1,155.87/km²)
ZIP code:63366, 63368
Area code:636
FIPS code:2954074
GNISfeature ID:0756460
Website:www.ofallon.mo.us

Online Interactive Map

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O’Fallon online map. Source: Basemap layers from Google Map, Open Street Map (OSM), Arcgisonline, Wmflabs. Boundary Data from Database of Global Administrative Areas.

O’Fallon location map. Where is O’Fallon city?

O'Fallon location on the U.S. Map. Where is O'Fallon city.
O’Fallon location on the U.S. Map.
O'Fallon location on the Missouri map. Where is O'Fallon city.
Location of O’Fallon in Missouri.

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.

O’Fallon Road Map

Road map of O'Fallon
Road map of O’Fallon

O’Fallon city Satellite Map

Satellite map of O'Fallon
Satellite map of O’Fallon

Geography

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

Climate

O’Fallon has a humid subtropical climate (Köppen Cfa). Summers are hot and humid, while winters are moderately cold.

See also

Map of Missouri State and its subdivision: Map of other states:
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Parent Unit Map

Map of St. Charles County, Missouri
St. Charles County is in the central eastern part of the U.S. state of Missouri. As of the 2020 census, the population was 405,262, making it Missouri’s third-most populous county. Its county seat is St. Charles. The county was organized October 1, 1812, and named for Saint Charles Borromeo, an Italian cardinal. St. Charles County ... Read more
Map of St. Charles County, Missouri

Related Administrative Divisions