Office Assistant II - C salary at San Mateo County

The average office assistant ii - c salary at San Mateo County was $36,920 , which is 17 percent lower than the average salary for this job in California, and 17 percent lower than the national average for this job . Office Assistant II - C salaries at San Mateo County typically range from $16,247 to $57,594 (25th to 75th percentile). The highest reported office assistant ii - c salary was $74,649. There are 6 employees at San Mateo County with the job title office assistant ii - c.