Highest salary at Richland County in year 2018 was $125,308. Number of employees at Richland County in year 2018 was 81. Average annual salary was $35,446 and median salary was $33,250. Richland County average salary is 24 percent lower than USA average and median salary is 24 percent lower than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 0.9 percent.