The O'Fallon City Treasurer works in conjunction with the Finance Department and is responsible for a Monthly Treasurer’s Report along with the City's Annual Treasurer’s Report.
City of O'Fallon, IL
255 South Lincoln, O'Fallon, IL 62269 Tel: (618) 624-4500 Fax: (618) 624-4508 City Hall Hours: Monday - Friday, 8:00 am - 5:00 pm