Highest salary at Grafton County in year 2022 was $147,097. Number of employees at Grafton County in year 2022 was 311. Average annual salary was $50,647 and median salary was $50,793. Grafton County average salary is 8 percent higher than USA average and median salary is 17 percent higher than USA median salary. From 2021 to 2022, the average salary of employees at this employer increased 6.6 percent, the median salary increased 7.0 percent.