Highest salary at Clay County in year 2020 was $132,590. Number of employees at Clay County in year 2020 was 192. Average annual salary was $35,886 and median salary was $35,726. Clay County average salary is 23 percent lower than USA average and median salary is 18 percent lower than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 10.6 percent, the median salary increased 9.3 percent.