Highest salary at Will County in year 2016 was $260,166. Number of employees at Will County in year 2016 was 2,302. Average annual salary was $55,474 and median salary was $51,079. Will County average salary is 18 percent higher than USA average and median salary is 17 percent higher than USA median salary. From 2015 to 2016, the average salary of employees at this employer increased 0.6 percent, the median salary increased 2.3 percent.