Highest salary at Pierce County in year 2020 was $70,200. Number of employees at Pierce County in year 2020 was 78. Average annual salary was $28,938 and median salary was $29,245. Pierce County average salary is 38 percent lower than USA average and median salary is 33 percent lower than USA median salary. From 2019 to 2020, the average salary of employees at this employer increased 12.9 percent, the median salary increased 31.1 percent.