Highest salary at Henderson in year 2011 was $43,954. Number of employees at Henderson in year 2011 was 17. Average annual salary was $24,940 and median salary was $20,930. Henderson average salary is 47 percent lower than USA average and median salary is 52 percent lower than USA median salary. From 2010 to 2011, the average salary of employees at this employer increased 9.3 percent, the median salary increased 1.9 percent.