Highest salary at Alton Township in year 2017 was $65,815. Number of employees at Alton Township in year 2017 was 12. Average annual salary was $45,561 and median salary was $43,789. Alton Township average salary is 3 percent lower than USA average and median salary is 1 percent higher than USA median salary. From 2016 to 2017, the median salary increased 5.9 percent.