Highest salary at Oak Lawn Sd 229 in year 2016 was $120,902. Number of employees at Oak Lawn Sd 229 in year 2016 was 82. Average annual salary was $35,066 and median salary was $29,856. Oak Lawn Sd 229 average salary is 25 percent lower than USA average and median salary is 31 percent lower than USA median salary. From 2015 to 2016, the median salary increased 3.4 percent.