Highest salary at Missoula County in year 2020 was $211,888. Number of employees at Missoula County in year 2020 was 801. Average annual salary was $49,504 and median salary was $46,105. Missoula County average salary is 6 percent higher than USA average and median salary is 6 percent higher than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 30.0 percent, the median salary increased 26.9 percent.