Highest salary at Grant County in year 2020 was $120,370. Number of employees at Grant County in year 2020 was 199. Average annual salary was $39,585 and median salary was $38,247. Grant County average salary is 16 percent lower than USA average and median salary is 12 percent lower than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 7.2 percent, the median salary increased 5.4 percent.