Highest salary at Sinton Isd in year 2016 was $147,088. Number of employees at Sinton Isd in year 2016 was 324. Average annual salary was $38,633 and median salary was $41,544. Sinton Isd average salary is 18 percent lower than USA average and median salary is 4 percent lower than USA median salary. From 2015 to 2016, the average salary of employees at this employer increased 4.5 percent, the median salary increased 2.3 percent.