Highest salary at County Of Boone in year 2018 was $115,621. Number of employees at County Of Boone in year 2018 was 193. Average annual salary was $36,881 and median salary was $43,460. County Of Boone average salary is 21 percent lower than USA average and median salary is the same as USA median salary. From 2017 to 2018, the median salary increased 2.9 percent.