Highest salary at Kelso Elem. in year 2017 was $63,000. Number of employees at Kelso Elem. in year 2017 was 20. Average annual salary was $30,180 and median salary was $35,450. Kelso Elem. average salary is 36 percent lower than USA average and median salary is 18 percent lower than USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 0.6 percent, the median salary increased 2.6 percent.