Highest salary at Seneca County in year 2018 was $185,070. Number of employees at Seneca County in year 2018 was 483. Average annual salary was $39,925 and median salary was $41,852. Seneca County average salary is 15 percent lower than USA average and median salary is 4 percent lower than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 6.4 percent, the median salary increased 7.0 percent.