Highest salary at Glenbrook Sd 225 in year 2016 was $127,585. Number of employees at Glenbrook Sd 225 in year 2016 was 381. Average annual salary was $37,612 and median salary was $34,588. Glenbrook Sd 225 average salary is 20 percent lower than USA average and median salary is 20 percent lower than USA median salary. From 2015 to 2016, the average salary of employees at this employer increased 1.9 percent, the median salary increased 5.7 percent.