Highest salary at Cass County in year 2017 was $280,562. Number of employees at Cass County in year 2017 was 132. Average annual salary was $37,629 and median salary was $30,608. Cass County average salary is 20 percent lower than USA average and median salary is 30 percent lower than USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 2.3 percent.