Highest salary at Islip Ufsd in year 2018 was $134,806. Number of employees at Islip Ufsd in year 2018 was 193. Average annual salary was $38,696 and median salary was $40,797. Islip Ufsd average salary is 17 percent lower than USA average and median salary is 6 percent lower than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 0.2 percent.