Highest salary at Cass County in year 2020 was $143,487. Number of employees at Cass County in year 2020 was 267. Average annual salary was $47,241 and median salary was $46,709. Cass County average salary is 1 percent higher than USA average and median salary is 7 percent higher than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 11.6 percent, the median salary increased 8.8 percent.