Highest salary at Robstown Isd in year 2017 was $165,400. Number of employees at Robstown Isd in year 2017 was 492. Average annual salary was $39,623 and median salary was $39,400. Robstown Isd average salary is 15 percent lower than USA average and median salary is 9 percent lower than USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 8.9 percent, the median salary increased 5.0 percent.