Highest Sumner employee salary in year 2017 was $219,078. Sumner employees number in year 2017 was 1,258. Sumner average salary was $52,744 and median salary was $51,052. According to the last payroll, Sumner average salary is 29 percent lower than USA average and 30 percent lower than Washington state average. Sumner employee salaries are usually between $24,967 and $77,999. Top 10% of highest-earning employees have salaries ranging from $90,463 to $219,078. From 2016 to 2017, the average salary of employees at this employer increased 5.0 percent, the median salary increased 8.0 percent.