Highest salary at Butler County in year 2021 was $146,073. Number of employees at Butler County in year 2021 was 136. Average annual salary was $37,780 and median salary was $40,075. Butler County average salary is 19 percent lower than USA average and median salary is 8 percent lower than USA median salary. From 2020 to 2021, the average salary of employees at this employer increased 5.5 percent, the median salary increased 2.6 percent.