The average employee salary for cook county, illinois in 2023 was $91,923. This is 28. 1 percent higher than the national average for government employees and 26. 7 percent higher than other counties. There are 59,309 employee. Webemployee payroll | cook county open data. Skip to main content. Cook county open data. Data homecook county websitecontact us. Webemployee payroll data for all cook county employees excluding forest preserves, indicating amount of base salary paid to an employee during the county fiscal quarter. Webhighest salary in cook county in 2020 was $149,999. Cook county average salary in 2020 was $100,971. It was 66% higher than the state average. Cook county median salary in. Webemployee payroll data for all cook county employees excluding forest preserves, indicating amount of base salary paid to an employee during the county. With a population of 5 million, cook county is classified as large. The median salary in cook county is higher than of cook or collar county median salaries in. Webtotal pay, broken into base and extra categories for all employees, is displayed below in the pie chart. Calculated based on agency reporting. Some agencies did not report extra. Webhighest salary at cook county in year 2022 was $180,001. Number of employees at cook county in year 2022 was 217. Average annual salary was $88,643 and median salary. Webthe average employee salary for cook county, illinois in 2022 was $89,336. This is 24. 5 percent higher than the national average for government employees and 23. 1 percent.