Highest salary at Essex County in year 2022 was $203,596. Number of employees at Essex County in year 2022 was 3,197. Average annual salary was $76,649 and median salary was $78,376. Essex County average salary is 64 percent higher than USA average and median salary is 80 percent higher than USA median salary. From 2021 to 2022, the average salary of employees at this employer increased 0.9 percent, the median salary increased 2.4 percent.