Small City · Missouri

Bill Hennessy

Mayor of O'Fallon, MO

NonpartisanElected 2025Next election 2029

Demographics

Census data for the city

Population: 46,169
Median household income: $104,863
Median age: 38
Land area: 30.55 sq mi
Population density: 1,511.3 per sq mi
County: St. Charles County
Metro area: St. Louis, MO-IL

City government

Budget and contact

Annual budget: ~$162M
City hall phone: (636) 240-2000
Official website: www.ofallon.mo.us →

For developers

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

-H "Authorization: Bearer cg_live_..."

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