Highest salary at Richland County in year 2019 was $133,127. Number of employees at Richland County in year 2019 was 85. Average annual salary was $35,453 and median salary was $33,348. Richland County average salary is 24 percent lower than USA average and median salary is 23 percent lower than USA median salary. From 2018 to 2019, the average salary of employees at this employer increased 0.0 percent, the median salary increased 0.3 percent.