Highest salary at Marathon in year 2012 was $72,621. Number of employees at Marathon in year 2012 was 17. Average annual salary was $28,914 and median salary was $37,138. Marathon average salary is 38 percent lower than USA average and median salary is 15 percent lower than USA median salary. From 2011 to 2012, the average salary of employees at this employer increased 4.4 percent, the median salary increased 5.3 percent.