Highest salary at Butler Borough in year 2018 was $289,908. Number of employees at Butler Borough in year 2018 was 82. Average annual salary was $77,947 and median salary was $77,227. Butler Borough average salary is 66 percent higher than USA average and median salary is 78 percent higher than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 9.4 percent, the median salary increased 2.5 percent.