Highest salary at Union County in year 2022 was $196,119. Number of employees at Union County in year 2022 was 321. Average annual salary was $41,797 and median salary was $42,404. Union County average salary is 11 percent lower than USA average and median salary is 2 percent lower than USA median salary. From 2021 to 2022, the average salary of employees at this employer increased 12.2 percent, the median salary increased 11.3 percent.