Administrative Services Assistant salary at Contra Costa County

The average administrative services assistant salary at Contra Costa County was $124,437 , which is 26 percent higher than the average salary for this job in California, and 121 percent higher than the national average for this job . Administrative Services Assistant salaries at Contra Costa County typically range from $116,552 to $149,571 (25th to 75th percentile). The highest reported administrative services assistant salary was $185,662. There are 122 employees at Contra Costa County with the job title administrative services assistant.