Town · Illinois

Eric Van Hook

Mayor of O'Fallon, IL

Demographics

Census data for the city

Population: 21,910
Median household income: $102,560
Median age: 37.3
Land area: 15.8 sq mi
Population density: 1,386.7 per sq mi
County: St. Clair County
Metro area: St. Louis, MO-IL

City government

Budget and contact

Annual budget: ~$77M
City hall phone: (618) 624-8730
Official website: www.ofallon.org →

For developers

Fetch this same data via API:

$ curl https://api.civicgrid.org/cities?state=IL \

-H "Authorization: Bearer cg_live_..."

Get API key →