Highest salary at Williamsville in year 2014 was $73,998. Number of employees at Williamsville in year 2014 was 23. Average annual salary was $36,060 and median salary was $36,668. Williamsville average salary is 23 percent lower than USA average and median salary is 16 percent lower than USA median salary. From 2013 to 2014, the average salary of employees at this employer increased 7.0 percent.