Highest salary at Shelter Island in year 2014 was $175,491. Number of employees at Shelter Island in year 2014 was 74. Average annual salary was $51,411 and median salary was $42,894. Shelter Island average salary is 10 percent higher than USA average and median salary is 1 percent lower than USA median salary. From 2013 to 2014, the average salary of employees at this employer increased 1.9 percent, the median salary increased 2.1 percent.