Highest salary at Johnson County in year 2024 was $144,191. Number of employees at Johnson County in year 2024 was 78. Average annual salary was $44,761 and median salary was $45,748. Johnson County average salary is 4 percent lower than USA average and median salary is 5 percent higher than USA median salary. From 2023 to 2024, the average salary of employees at this employer increased 15.9 percent, the median salary increased 17.3 percent.