Library Aide I /Per Diem salary at San Mateo

The average library aide i /per diem salary at San Mateo was $18,452 , which is 282 percent higher than the average salary for this job in California, and 282 percent higher than the national average for this job . Library Aide I /Per Diem salaries at San Mateo typically range from $17,288 to $20,221 (25th to 75th percentile). The highest reported library aide i /per diem salary was $20,221. There are 5 employees at San Mateo with the job title library aide i /per diem.