Highest salary at Marathon in year 2014 was $68,911. Number of employees at Marathon in year 2014 was 21. Average annual salary was $27,178 and median salary was $32,689. Marathon average salary is 42 percent lower than USA average and median salary is 25 percent lower than USA median salary. From 2013 to 2014, the average salary of employees at this employer increased 4.5 percent, the median salary increased 5.2 percent.