Administrative Assistant salary at County of San Mateo

The average administrative assistant salary at County of San Mateo was $69,298 , which is 26 percent lower than the average salary for this job in California, and 8 percent lower than the national average for this job . Administrative Assistant salaries at County of San Mateo typically range from $68,396 to $77,980 (25th to 75th percentile). The highest reported administrative assistant salary was $80,832. There are 21 employees at County of San Mateo with the job title administrative assistant.