Highest salary at Ferry County in year 2021 was $133,146. Number of employees at Ferry County in year 2021 was 143. Average annual salary was $34,706 and median salary was $39,671. Ferry County average salary is 26 percent lower than USA average and median salary is 9 percent lower than USA median salary. From 2020 to 2021, the average salary of employees at this employer increased 16.1 percent, the median salary increased 24.4 percent.