Highest salary at Lake County in year 2017 was $269,938. Number of employees at Lake County in year 2017 was 2,594. Average annual salary was $57,500 and median salary was $52,262. Lake County average salary is 23 percent higher than USA average and median salary is 20 percent higher than USA median salary. From 2016 to 2017, the median salary increased 0.3 percent.