State: Illinois
County: St Clair County
Close cities: Lebanon, IL, Troy, IL, Fairview Heights, IL, Shiloh, IL, Swansea, IL, Shiloh, IL, Mascoutah, IL, O'Fallon, IL, O'Fallon, IL, Belleville, IL, Lebanon, IL, Lebanon, IL, Maryville, IL, Scott AFB, IL, Caseyville, IL, Swansea, IL, Fairview Heights, IL, Collinsville, IL, O'Fallon, IL, Troy, IL, Caseyville, IL
O'Fallon Population (census data)| Total | 27,061 (+19.9% since 2000) |
| Male | 13,052 (48.2%) |
| Female | 14,009 (51.8%) |
Population Density: 2,480 people per sq. mile
Cost of Living Index: 80.7 (US Avg is 100)
O'Fallon Elevation: 550 feet above sea level
Land Area: 10.9 square miles
Median Household Income: $66,337
Zip Codes:
62269.