Highest salary at Ontario County in year 2016 was $169,043. Number of employees at Ontario County in year 2016 was 1,102. Average annual salary was $48,865 and median salary was $50,461. Ontario County average salary is 4 percent higher than USA average and median salary is 16 percent higher than USA median salary. From 2015 to 2016, the average salary of employees at this employer increased 1.9 percent, the median salary increased 4.7 percent.