Highest salary at Gaston County in year 2020 was $238,273. Number of employees at Gaston County in year 2020 was 1,755. Average annual salary was $47,300 and median salary was $46,169. Gaston County average salary is 1 percent higher than USA average and median salary is 6 percent higher than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 10.4 percent, the median salary increased 9.7 percent.