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Layers
Territory
- GEOID
- 1755249
- OCD-ID
- ocd-division/country:us/state:il/place:o~fallon
- POP
- 32,656 (2025)
- CENTER
- 38.5976, -89.9147
- SOURCE
- census tiger
Government of O'Fallon
Bodies, seats, agencies and services that belong to O'Fallon itself.
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Since 2026
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Since 2026
Organization 14
Departments
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All city departments report directly to the City Administrator.
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City Clerk Clerk
Performs duties mandated by state and local law, serving the City Council and the general public.
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Provides professional land development services and promotes the health, safety, and general welfare of residents and businesses.
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O'Fallon-Shiloh Emergency Medical Services Department.
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Finance Finance
Maintains and reconciles all financial records including accounts payable/receivable, procurement, year-end audit, and annual budget.
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Fire Rescue Fire
O'Fallon Fire Rescue provides fire and emergency services to the community.
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Responsible for recruitment, employee selection, employee relations, compensation, and benefits administration.
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Responsible for supporting the City of O'Fallon technology and communication systems.
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Library Library
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Parks & Recreation Parks & Recreation
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Police Police
Dedicated to proactively solving problems and protecting life and property through education, prevention, and enforcement.
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Public Works Public Works
Achieves the highest possible quality of life through effective planning, management, operation and maintenance of city infrastructure serving O'Fallon, Fairview Heights, and Shiloh.
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Processes requests for water start up and discontinuation of services.