Last updated: 2025 BLS data · Page refreshed:
What does a First-Line Supervisors of Correctional Officers salary really buy you in Illinois?
Illinois is near the US average cost of livingData: BLS OEWS 2025 + BEA Regional Price Parities 2022 • Updated 2026-05-19
Illinois's Regional Price Parity (RPP) is 101.3, meaning prices are 1.3% higher the national average. A First-Line Supervisors of Correctional Officers earning $105,450 in Illinois has the equivalent purchasing power of $104,096 in an average-cost US state.
Every dollar goes further in low-cost states. Here is how each salary percentile compares after adjusting for Illinois's cost of living.
| Percentile | Nominal Salary | COL-Adjusted | Difference |
|---|---|---|---|
| 10th Percentile (P10) | $83,990 | $82,912 | $-1,077 |
| 25th Percentile (P25) | $93,590 | $92,388 | $-1,201 |
| Median (P50) | $105,450 | $104,096 | $-1,353 |
| 75th Percentile (P75) | $129,590 | $127,926 | $-1,663 |
| 90th Percentile (P90) | $160,790 | $158,726 | $-2,063 |
Illinois's cost of living is close to the national average, so $105,450 keeps most of its value at $104,096 in real terms. Location choice here is more about career opportunities than cost arbitrage.
With an RPP of 101.3, Illinois is within a few percent of the national cost-of-living baseline. Salary adjustment for First-Line Supervisors of Correctional Officers is therefore minor — what you earn is close to what you'd keep in real purchasing power.
After adjusting for Illinois's cost of living, $105,450 nominal nets out to $104,097 in real purchasing power — a small 1.3% loss. The state's cost profile is close enough to average that COL alone shouldn't drive location decisions for this First-Line Supervisors of Correctional Officers.
Ranked on COL-adjusted median pay for First-Line Supervisors of Correctional Officers, Illinois places #6 of 49 states — top quartile. Either nominal wages run high, cost of living runs low, or both.
Where does First-Line Supervisors of Correctional Officers salary stretch the furthest? Top 10 states ranked by COL-adjusted median salary.
Illinois ranks #6 out of 49 states for First-Line Supervisors of Correctional Officers after cost-of-living adjustment.
How much do you actually take home? See First-Line Supervisors of Correctional Officers take-home pay in Illinois after taxes →
A First-Line Supervisors of Correctional Officers in Illinois earns a median salary of $105,450 per year. After adjusting for Illinois's cost of living (RPP=101.3), the real purchasing power is $104,096 — a -1.3% difference.
Illinois's cost of living is 1.3% higher than the national average according to the BEA Regional Price Parities (2022). The RPP index for Illinois is 101.3 (US average = 100).
Regional Price Parities (RPPs) are price indexes published by the U.S. Bureau of Economic Analysis (BEA) that measure differences in price levels across states. They are expressed as a percentage of the national average (US = 100). Higher RPP means higher cost of living.
The adjusted salary is calculated as: Nominal Salary x (100 / RPP). For a First-Line Supervisors of Correctional Officers in Illinois: $105,450 x (100 / 101.3) = $104,096. This represents what the salary would be worth in a state with average living costs.
Some links are affiliate links. See our disclosure.