The median annual wage for Probation Officers and Correctional Treatment Specialists in Illinois is $70,350 (May 2024 BLS OES). The mean (average) is $77,290.
Pay spans roughly $50,160 at the 10th percentile to $106,290 at the 90th, so experience and specialisation move this figure a lot. At the median that is about $33.82 per hour. An estimated 2,540 people work as probation officers and correctional treatment specialists in Illinois.
| Median (annual) | $70,350 |
| Mean (annual) | $77,290 |
| Median (hourly) | $33.82 |
| 10th percentile | $50,160 |
| 90th percentile | $106,290 |
| Employment | 2,540 |
Updated 2026-07-23.
Source: BLS OES May 2024 — bls.gov/oes. Checked 2026-07-23.