Highest salary at Warren County in year 2018 was $170,834. Number of employees at Warren County in year 2018 was 927. Average annual salary was $42,211 and median salary was $41,123. Warren County average salary is 10 percent lower than USA average and median salary is 5 percent lower than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 1.6 percent, the median salary increased 1.1 percent.