Highest City Of Gustine employee salary in year 2018 was $144,352. City Of Gustine employees number in year 2018 was 22. City Of Gustine average salary was $41,349 and median salary was $41,969. According to the last payroll, City Of Gustine average salary is 45 percent lower than USA average and 58 percent lower than California state average. City Of Gustine employee salaries are usually between $28,122 and $49,243. Top 10% of highest-earning employees have salaries ranging from $60,364 to $144,352.