City profile · United States · North America
O'Fallon
City population
29,002
#1,613
in United States
#74
in Illinois
#18,599
worldwide
38.592, -89.911 · 1,116 km from Washington
About O'Fallon
O'Fallon is a city in Illinois, United States with a population of 29,002. It is the 1,613th largest of the 3,112 cities of 15,000 or more listed in United States, and the 18,599th largest worldwide. It lies 1,116 km from Washington.
Key Facts
Country
Region
Rank in region
#74of 167
Elevation
167 m
Time zone
America/Chicago
Coordinates
38.592, -89.911
Record updated
2017-05-23
Entry edited, not measured
City population, GeoNames. GeoNames publishes no year for its population figures, so “record updated” is when the entry was last edited — not the date the population was measured.
Nearby Cities
All 3,112 in United StatesClosest listed cities by great-circle distance from the city centre.