Highest City Of San Mateo employee salary in year 2018 was $265,782. City Of San Mateo employees number in year 2018 was 531. City Of San Mateo average salary was $104,958 and median salary was $100,284. According to the last payroll, City Of San Mateo average salary is 40 percent higher than USA average and 13 percent higher than California state average. City Of San Mateo employee salaries are usually between $73,976 and $127,906. Top 10% of highest-earning employees have salaries ranging from $174,825 to $265,782.