Highest salary at Grasslake Sd 36 in year 2018 was $52,122. Number of employees at Grasslake Sd 36 in year 2018 was 15. Average annual salary was $25,852 and median salary was $25,457. Grasslake Sd 36 average salary is 45 percent lower than USA average and median salary is 41 percent lower than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 4.9 percent, the median salary increased 22.7 percent.