Highest Zillah employee salary in year 2017 was $147,127. Zillah employees number in year 2017 was 154. Zillah average salary was $51,402 and median salary was $51,808. According to the last payroll, Zillah average salary is 31 percent lower than USA average and 30 percent lower than Washington state average. Zillah employee salaries are usually between $26,120 and $71,743. Top 10% of highest-earning employees have salaries ranging from $80,051 to $147,127.