Highest salary at Alton Cusd 11 in year 2018 was $182,637. Number of employees at Alton Cusd 11 in year 2018 was 620. Average annual salary was $47,567 and median salary was $52,199. Alton Cusd 11 average salary is 1 percent higher than USA average and median salary is 20 percent higher than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 3.8 percent, the median salary increased 2.9 percent.