Departments

Department Address Phone
Mayor's Office
O'Fallon City Hall
255 S. Lincoln Ave.
O'Fallon, IL 62269
(618) 624-4500 ext. 8730
Administration
255 S Lincoln Ave
O'Fallon, IL 62269
(618) 624-4500
Building & Inspections Division
City Hall, 2nd Floor
255 S Lincoln Ave
O'Fallon, IL 62269
(618) 624-4500 ext. 4
City Clerk
255 S. Lincoln Ave.
O'Fallon, IL 62269
(618) 624-4500 ext. 8715
(618) 624-4500 ext. 8716
City Council
Community Development Department
255 S Lincoln Ave
2nd Floor
O'Fallon, IL 62269
(618) 624-4500 ext. 4
Crime Free Rental Housing Program
O'Fallon Department of Public Safety
285 N. Seven Hills Rd.
O'Fallon, IL 62269
(618) 624-9511
Criminal Investigations Division
Economic Development Division
255 S Lincoln Ave
2nd Floor
O'Fallon, IL 62269
(618) 624-4500 ext. 4
Emergency Medical Services
O'Fallon Department of Public Safety
285 N. Seven Hills Rd.
O'Fallon, IL 62269
(618) 624-4516
Finance Department
City Hall
255 S. Lincoln Ave.
O'Fallon, IL 62269
(618) 624-4500
Fire Department
1215 Taylor Rd
O'Fallon, IL 62269
(618) 624-4515
For Employees Only
255 South Lincoln
O'Fallon, IL 62269
(618) 624-4500 ext 8740
Human Resources
Human Resources Office
255 South Lincoln Ave
1st Floor
O'Fallon, IL 62269
618-624-4500
Information Technology
Information Technology
318 W 2nd St
O'Fallon, IL 62269
(618) 624-4500 ext. 5
O'Fallon On Demand
O'Fallon Parks and Recreation
Katy Cavins Community Center
308 E. Fifth Street
O'Fallon, IL 62269
(618) 624-0139
O'Fallon Public Library
O'Fallon Public Library
120 Civic Plaza
O'Fallon, IL 62269
(618) 632-3783
Parks
Katy Cavins Community Center
308 E. Fifth Street
O'Fallon, IL 62269
618-624-0139
Planning & Zoning Division
255 S Lincoln Avenue
2nd Floor
O'Fallon, IL 62269
(618) 624-4500 ext. 4
Police Department
O'Fallon Dept. of Public Safety
285 N. Seven Hills Rd.
O'Fallon, IL 62269
(618) 624-4545
(618)624-4550 TTY
Public Access Television
Public Works Department
City Hall
255 S Lincoln Ave.
2nd Floor
O'Fallon, IL 62269
(618) 624-4500 ext. 3
Stormwater Program
618-624-4500 Ext.3
Street Division
618-624-4500 ext.3
Summer Camp and School's Out Days
Katy Cavins Community Center
308 E. Fifth Street
O'Fallon, IL 62269
618-624-0139
Treasurer
255 S. Lincoln Ave.
O'Fallon, IL 62269
(618) 624-4500
Utility Billing
255 S. Lincoln Ave.
O'Fallon, IL 62269
(618) 624-4500 ext 1
Youth Sports