O'Fallon Township, St. Clair County, Illinois
O'Fallon Township | |
|---|---|
Township | |
Location in St. Clair County | |
St. Clair County's location in Illinois | |
| Country | United States |
| State | Illinois |
| County | St. Clair |
| Established | November 6, 1883 |
| Area | |
• Total | 35.78 sq mi (92.7 km2) |
| • Land | 35.12 sq mi (91.0 km2) |
| • Water | 0.66 sq mi (1.7 km2) 1.84% |
| Population (2010) | |
• Total | 26,467 |
• Estimate (2018) | 29,484 |
| • Density | 741.9/sq mi (286.4/km2) |
| Time zone | UTC-6 (CST) |
| • Summer (DST) | UTC-5 (CDT) |
| FIPS code | 17-163-55262 |
O'Fallon Township is located in St. Clair County, Illinois. As of the 2010 census, its population was 26,053 and it contained 10,338 housing units.