Highest salary at Richland County in year 2021 was $126,302. Number of employees at Richland County in year 2021 was 78. Average annual salary was $39,832 and median salary was $35,472. Richland County average salary is 15 percent lower than USA average and median salary is 18 percent lower than USA median salary. From 2020 to 2021, the average salary of employees at this employer increased 2.7 percent.