Highest City of Newton employee salary in year 2020 was $139,088. City of Newton employees number in year 2020 was 222. City of Newton average salary was $41,870 and median salary was $49,987. According to the last payroll, City of Newton average salary is 44 percent lower than USA average but 19 percent higher than Iowa state average. City of Newton employee salaries are usually between $3,306 and $69,652. Top 10% of highest-earning employees have salaries ranging from $84,071 to $139,088.