Highest salary at Guernsey County in year 2021 was $131,492. Number of employees at Guernsey County in year 2021 was 492. Average annual salary was $36,186 and median salary was $37,991. Guernsey County average salary is 23 percent lower than USA average and median salary is 13 percent lower than USA median salary. From 2020 to 2021, the average salary of employees at this employer increased 26.8 percent, the median salary increased 22.4 percent.