Highest salary at Bethalto Cusd 8 in year 2018 was $137,750. Number of employees at Bethalto Cusd 8 in year 2018 was 195. Average annual salary was $52,423 and median salary was $55,813. Bethalto Cusd 8 average salary is 12 percent higher than USA average and median salary is 28 percent higher than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 15.3 percent, the median salary increased 8.2 percent.