Cook County, Illinois / Adult Probation Department

Agency file

Adult Probation Department

Source file: Cook County, Illinois — Employee Payroll / ingested Jun 19, 2026

The Adult Probation Department runs the corrections system — operating prisons and jails, supervising people in custody, and managing parole or probation.

In 2018, this agency had 542 employees with median total compensation of $22,023; the highest distinct record was $42,290.

Year: 2018
Total payroll: $10.7M
Employees: 542
Median total: $22,023
Highest record: $42,290

What the records show

Compensation analytics

These summaries compare pay within the agency before listing individual records.

Salary distribution

-$3,722$26,971+

Hover a bar for its range; click to filter the list below.

How 2018 total compensation is spread across the 542 employees. Each bar is a pay range; taller bars mean more people earn in that range. The amber line marks the median ($22,023) — half earn less, half more. The far-right bar collects the highest earners.

Average pay composition

Base — $19,783 (100%)
Overtime — $0 (0%)
Other — $0 (0%)
Benefits — $0 (0%)

What an average paycheck here is made of — base salary versus overtime, other pay (bonuses, allowances), and benefits. A large overtime or other-pay share means take-home often exceeds base salary.

Pay percentiles

10th

25th

Median

75th

90th

$13,593

$15,700

$22,023

$22,420

$24,682

The pay ladder for this department. Someone at the 90th percentile earns $24,682 — more than 90% of the department; the 10th percentile earns $13,593. The shaded band is the middle half of employees (25th–75th percentile).

Largest job titles

Adult Probation Officer- Psb

188 · $22,420

Pretrial Officer I- Psb

62 · $22,288

Adult Probation Officer- Psc

52 · $24,669

Adult Probation Officer

45 · $15,700

Supervisor Adult Probation

31 · $24,324

The most common job titles in this department by headcount, with the median total compensation for each. Click a title to see everyone who holds it.

Trend

Year over year

How this department's total payroll, headcount, and median pay changed across the 3 published years.

Year	Total payroll	Employees	Median pay
2016	$11.1M —	647 —	$20,610 —
2017	$10.8M ▼ 2.8%	593 ▼ 8.3%	$21,495 ▲ 4.3%
2018	$10.7M ▼ 0.4%	542 ▼ 8.6%	$22,023 ▲ 2.5%

Record list

Employees

Page 1

David Lewandowski

Pretrial Officer I- Psb/Adult Probation Department

2017 total comp

$7,781

Base pay: $7,781
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $7,781
Hire date: 1992-11-16

Source-specific fields

Employee Identifier: f9494092-2924-4008-a4f5-9bc720441c03
Fiscal Period: 2017Q1
Fiscal Quarter: 1
Job Code: 672
Office: 1280
Position Id: 9512813

David Lewandowski holds the role of Pretrial Officer I- Psb at Adult Probation Department. Hired in 1992, they have about 25 years of service. In 2017, their total compensation was $7,781.

Mary O'Brien

Adult Probation Officer- Psb/Adult Probation Department

2017 total comp

$7,781

Base pay: $7,781
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $7,781
Hire date: 1995-09-25
Middle name: Pat

Source-specific fields

Employee Identifier: 90b86ac8-421f-4c7d-9f37-3730096c9484
Fiscal Period: 2017Q1
Fiscal Quarter: 1
Job Code: 1567
Office: 1280
Position Id: 9512294

At Adult Probation Department, Mary O'Brien serves as a Adult Probation Officer- Psb. Their tenure dates to 1995, about 22 years. Their 2017 pay totaled $7,781.

Connie Williams

Adult Probation Deputy Chief/Adult Probation Department

2018 total comp

$7,736

Base pay: $7,736
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $7,736
Hire date: 1973-05-21
Middle name: M

Source-specific fields

Employee Identifier: 4c77f550-51f8-44e2-b110-684ef811e2fd
Fiscal Period: 2018Q2
Fiscal Quarter: 2
Job Code: 6696
Office: 1280
Position Id: 9512768

Connie Williams works as a Adult Probation Deputy Chief for Adult Probation Department. Hired in 1973, they have about 45 years of service. Connie earned $7,736 in 2018.

Charles Cairo

Administrative Assistant III/Adult Probation Department

2016 total comp

$7,489

Base pay: $7,489
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $7,489
Hire date: 1999-02-16
Middle name: E

Source-specific fields

Employee Identifier: 01b73c2d-3937-4f74-9447-c4633aba7cfa
Fiscal Period: 2016Q4
Fiscal Quarter: 4
Job Code: 48
Office: 1280
Position Id: 9512089

Charles Cairo holds the role of Administrative Assistant III at Adult Probation Department. Hired in 1999, they have about 17 years of service. In 2016, their total compensation was $7,489.