Highest salary at Jefferson County in year 2024 was $159,647. Number of employees at Jefferson County in year 2024 was 673. Average annual salary was $51,931 and median salary was $51,923. Jefferson County average salary is 11 percent higher than USA average and median salary is 19 percent higher than USA median salary. From 2023 to 2024, the average salary of employees at this employer increased 5.9 percent, the median salary increased 7.1 percent.