O'Fallon is located in United States. It is positioned in "America/Chicago" time zone (GMT-5 ) with current time of 02:25 AM, Wednesday (difference from your time zone: hours). O'Fallon is populated place in Illinois in Saint Clair County with population of ∼28.3 thousand.
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Places around O'Fallon sort by population
Collinsville
10.8 km 
Fairview Heights
6.9 km 
Swansea
9.4 km 
Shiloh
3.6 km 
Maryville
15.1 km 
Mascoutah
15.3 km 
Lebanon
9.1 km 
Caseyville
11.1 km 
Scott Air Force Base
7.6 km
Sources, notes:
• Map is powered by openstreetmap.org.
• Geographic location info from www.geonames.org database.
• Population data is only approximately value, it may be out of date.
• Distance calculator between two coordinates is powered by PHP with rounding precision of 0.1 km (or 1 km for longer distances), source code can be found at 1km.net site.
