Highest salary at Dupage County in year 2022 was $269,498. Number of employees at Dupage County in year 2022 was 3,081. Average annual salary was $61,346 and median salary was $56,004. Dupage County average salary is 31 percent higher than USA average and median salary is 29 percent higher than USA median salary. From 2021 to 2022, the average salary of employees at this employer increased 17.1 percent, the median salary increased 18.1 percent.