Highest salary at Mart Isd in year 2017 was $82,500. Number of employees at Mart Isd in year 2017 was 85. Average annual salary was $41,903 and median salary was $43,500. Mart Isd average salary is 11 percent lower than USA average and median salary is the same as USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 6.2 percent, the median salary increased 10.8 percent.