Office Assistant salary at Ontario-Montclair

The average office assistant salary at Ontario-Montclair was $70,110 , which is 25 percent higher than the average salary for this job in California, and 69 percent higher than the national average for this job . Office Assistant salaries at Ontario-Montclair typically range from $62,171 to $78,048 (25th to 75th percentile). The highest reported office assistant salary was $78,048. There are 2 employees at Ontario-Montclair with the job title office assistant.