Highest salary at Mclean County in year 2017 was $165,308. Number of employees at Mclean County in year 2017 was 857. Average annual salary was $39,685 and median salary was $39,045. Mclean County average salary is 15 percent lower than USA average and median salary is 10 percent lower than USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 1.8 percent, the median salary increased 3.6 percent.