Highest salary at Benton County in year 2020 was $136,439. Number of employees at Benton County in year 2020 was 313. Average annual salary was $50,802 and median salary was $52,380. Benton County average salary is 8 percent higher than USA average and median salary is 20 percent higher than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 5.2 percent, the median salary increased 4.1 percent.