Highest salary at Mckinney Isd in year 2017 was $236,250. Number of employees at Mckinney Isd in year 2017 was 2,784. Average annual salary was $52,001 and median salary was $55,350. Mckinney Isd average salary is 11 percent higher than USA average and median salary is 27 percent higher than USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 5.5 percent, the median salary increased 6.4 percent.