Highest salary at Benton County in year 2021 was $225,152. Number of employees at Benton County in year 2021 was 736. Average annual salary was $50,861 and median salary was $50,415. Benton County average salary is 9 percent higher than USA average and median salary is 16 percent higher than USA median salary. From 2020 to 2021, the median salary increased 0.4 percent.