Office Assistant salary at Riverside County

The average office assistant salary at Riverside County was $53,949 , which is 14 percent lower than the average salary for this job in California, but 9 percent higher than the national average for this job . Office Assistant salaries at Riverside County typically range from $43,376 to $67,484 (25th to 75th percentile). The highest reported office assistant salary was $112,091. There are 1,235 employees at Riverside County with the job title office assistant.