Highest salary at Stephenson County in year 2020 was $169,242. Number of employees at Stephenson County in year 2020 was 319. Average annual salary was $37,324 and median salary was $33,259. Stephenson County average salary is 20 percent lower than USA average and median salary is 24 percent lower than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 2.8 percent, the median salary increased 3.3 percent.