Highest salary at Alton Cusd 11 in year 2015 was $185,420. Number of employees at Alton Cusd 11 in year 2015 was 678. Average annual salary was $45,451 and median salary was $49,261. Alton Cusd 11 average salary is 3 percent lower than USA average and median salary is 13 percent higher than USA median salary.