Highest City of Mason City employee salary in year 2023 was $208,058. City of Mason City employees number in year 2023 was 524. City of Mason City average salary was $35,480 and median salary was $18,404. According to the last payroll, City of Mason City average salary is 53 percent lower than USA average but 1 percent higher than Iowa state average. City of Mason City employee salaries are usually between $1,663 and $62,804. Top 10% of highest-earning employees have salaries ranging from $89,268 to $208,058.