Highest salary at Williamsville in year 2010 was $66,056. Number of employees at Williamsville in year 2010 was 23. Average annual salary was $31,161 and median salary was $37,116. Williamsville average salary is 34 percent lower than USA average and median salary is 15 percent lower than USA median salary. From 2009 to 2010, the average salary of employees at this employer increased 12.6 percent, the median salary increased 29.1 percent.