Webin 2023 cook county, illinois reported 6,311 employees making more than $100,000 per year; The average salary was $91,923. The highest reported pay for the county was. Highest salary at cook county in year 2022 was $180,001. Number of employees at cook county in year 2022 was 217. 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. Webthe 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 records for cook county, illinois. Highest salary at cook county in year 2020 was $149,999. Number of employees at cook county in year 2020 was 44. Webof the 60,000 government workers employed throughout illinois, cook county exceeds any other county in the state, paying an average salary of $64,378 to.