Administrative Staff Assistant salary at King County

The average administrative staff assistant salary at King County was $75,241 , which is 7 percent higher than the average salary for this job in Washington, and 13 percent higher than the national average for this job . Administrative Staff Assistant salaries at King County typically range from $70,786 to $82,301 (25th to 75th percentile). The highest reported administrative staff assistant salary was $120,506. There are 17 employees at King County with the job title administrative staff assistant.