Introduction to O'Fallon, Missouri

O'Fallon, Missouri, in St. Charles county, is 4 miles W of St. Peters, Missouri (center to center) and 25 miles NW of St. Louis, Missouri. The municipality is part of the St. Louis Metropolitan Area. Citi Mortage's headquarters and MasterCard's Global Technology and Operations Center are located in the city.

O'Fallon History

In the 1830s a large number of German settlers arrived in the O'Fallon region. In 1854 Judge Krekel gave permission to the North Missouri Railroad to construct a train depot on his land. Judge Krekel gave the name O'Fallon Station to the depot in tribute to John O'Fallon, the railroads's president. In 1856 the first house and store were constructed.

In order to protect homes and businesses during the Civil War, German immigrants created a Union regiment to protect the vital North Missouri Railroad line. For a long span of time O'Fallon was a small town, however beginning in the early 1980's it experienced a significant population growth.

O'Fallon Attractions

  • T.R. Hughes Ballpark
  • Family Arena
  • Butterfly House
  • Celebration of Lights
  • Heritage & Freedom Fest
  • Fall Festival & Craft Bazaar
  • Jammin' Outdoor Summer Concert Series
  • 9-11 Memorial: A Tribute to First Responders
  • Historical Society's Log Cabin Museum
  • O'Fallon Veterans Memorial Walk
  • Zumwalt's Fort
  • Omer J. Dames War Memorial
  • St. Charles County Amateur Sports Hall of Fame

O'Fallon Activities

Fort Zumwalt Park includes a lake for fishing. Dames Park, Ozzie Smith Sports Complex, Westhoff Park and O'Fallon Sports Park are available for outdoor activities. Quail Ridge County Park Trail features trails in grasslands and wooded areas. The August A. Busch Memorial Conservation Area offers a variety of landscapes. Howell Island Conservation Area Trail is situated near the Missouri River and features a variety of wildflowers, birds and wildlife. The Lost Valley Trail is located in a scenic environment.

O'Fallon Higher Education

O'Fallon is home to satellite campuses of Webster University and Lindenwood University.

Ofallon Almanac

Phone Area Codes
Time Zone
Approximate Latitude
Approximate Longitude

Ofallon Climate

Nearest Weather Stations


  • Temp ranges are avg daily min and max for the month
  • Precipitation is rainfall (and rainfall equiv of snowfall)

Distance6.1 miles
Jan Temp19 to 38 F
Apr Temp42 to 67 F
Jul Temp68 to 90 F
Oct Temp45 to 70 F
Annual Precip38.2 inches
Distance13.2 miles
Jan Temp17 to 38 F
Apr Temp43 to 66 F
Jul Temp67 to 89 F
Oct Temp43 to 69 F
Annual Precip38 inches
Distance23.4 miles
Jan Temp20 to 37 F
Apr Temp44 to 65 F
Jul Temp67 to 88 F
Oct Temp46 to 68 F
Annual Precip37 inches

Nearby Cities and Towns

LocationPopulationMedian Family Income
Dardenne Prairie12,938$134,599
Lake St. Louis15,371$99,287
St. Paul2,279$107,292
St. Peters56,375$90,768
Sources :
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