Highest salary at Grasslake Sd 36 in year 2017 was $49,972. Number of employees at Grasslake Sd 36 in year 2017 was 15. Average annual salary was $24,641 and median salary was $20,747. Grasslake Sd 36 average salary is 47 percent lower than USA average and median salary is 52 percent lower than USA median salary.