Highest salary at Sullivan County in year 2020 was $126,454. Number of employees at Sullivan County in year 2020 was 254. Average annual salary was $39,114 and median salary was $37,679. Sullivan County average salary is 17 percent lower than USA average and median salary is 13 percent lower than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 4.8 percent, the median salary increased 2.6 percent.