Highest salary at Johnson County in year 2024 was $159,807. Number of employees at Johnson County in year 2024 was 261. Average annual salary was $36,090 and median salary was $41,085. Johnson County average salary is 23 percent lower than USA average and median salary is 6 percent lower than USA median salary. From 2023 to 2024, the average salary of employees at this employer increased 0.6 percent, the median salary increased 4.6 percent.