Highest salary at Dewey County in year 2022 was $52,800. Number of employees at Dewey County in year 2022 was 134. Average annual salary was $27,955 and median salary was $37,375. Dewey County average salary is 40 percent lower than USA average and median salary is 14 percent lower than USA median salary. From 2021 to 2022, the average salary of employees at this employer increased 8.5 percent.