Administrative Assistant salary at King County

The average administrative assistant salary at King County was $116,253 , which is 160 percent higher than the average salary for this job in Washington, and 55 percent higher than the national average for this job . Administrative Assistant salaries at King County typically range from $105,810 to $114,199 (25th to 75th percentile). The highest reported administrative assistant salary was $141,008. There are 9 employees at King County with the job title administrative assistant.