Highest salary at Whiteside County in year 2016 was $206,850. Number of employees at Whiteside County in year 2016 was 319. Average annual salary was $43,342 and median salary was $37,305. Whiteside County average salary is 8 percent lower than USA average and median salary is 14 percent lower than USA median salary. From 2015 to 2016, the average salary of employees at this employer increased 5.6 percent, the median salary increased 3.9 percent.