Office Assistant salary at Riverside County

The average office assistant salary at Riverside County was $51,335 , which is 9 percent lower than the average salary for this job in California, but 24 percent higher than the national average for this job . Office Assistant salaries at Riverside County typically range from $40,993 to $64,702 (25th to 75th percentile). The highest reported office assistant salary was $128,426. There are 1,280 employees at Riverside County with the job title office assistant.