Senior Library Assistant salary at County of San Mateo

The average senior library assistant salary at County of San Mateo was $58,674 , which is 39 percent lower than the average salary for this job in California, but 45 percent higher than the national average for this job . Senior Library Assistant salaries at County of San Mateo typically range from $60,529 to $68,999 (25th to 75th percentile). The highest reported senior library assistant salary was $69,526. There are 5 employees at County of San Mateo with the job title senior library assistant.