Highest salary at Hillsboro Sd 3 in year 2015 was $66,300. Number of employees at Hillsboro Sd 3 in year 2015 was 142. Average annual salary was $21,806 and median salary was $18,744. Hillsboro Sd 3 average salary is 53 percent lower than USA average and median salary is 57 percent lower than USA median salary.