Highest Riverside employee salary in year 2017 was $165,835. Riverside employees number in year 2017 was 225. Riverside average salary was $44,518 and median salary was $39,640. According to the last payroll, Riverside average salary is 40 percent lower than USA average and 41 percent lower than Washington state average. Riverside employee salaries are usually between $18,047 and $68,254. Top 10% of highest-earning employees have salaries ranging from $78,457 to $165,835. From 2016 to 2017, the average salary of employees at this employer increased 1.0 percent, the median salary increased 0.3 percent.