| Adult Probation | |
| Animal Protection Services | |
| Auditor's Office | |
| Board of Review | |
| CASA | |
| Circuit Clerk's Office | |
| Coroner's Office | |
| County Administration | |
| County Clerk's Office | |
| Courthouse Sheriff's Office | |
| Courts Administration | |
| E.T.S.B. (E-911) | |
| Emergency Management Agency | |
| Facilities & Grounds Operations | |
| Family Justice Center | |
| Finance | |
| Heddington Oaks | |
| Highway | |
| Human Resources | |
| Information Technology Services | |
| Juvenile Detention Center | |
| Juvenile Probation | |
| Peoria Board of Election Commissioners | |
| Peoria City/County Health Department | |
| Planning & Zoning | |
| Probation & Court Services | |
| Public Defender's Office | |
| Recorder of Deeds Office | |
| Recycling & Resource Conservation | |
| Regional Office of Education | |
| Sheriff's Office | |
| State's Attorney Office | |
| Supervisor of Assessments | |
| Treasurer | |
| Veteran's Assistance Commission | |