Senior Administrative Assistant salary at Ontario

The average senior administrative assistant salary at Ontario was $83,450 , which is 16 percent lower than the average salary for this job in California, but 82 percent higher than the national average for this job . Senior Administrative Assistant salaries at Ontario typically range from $47,576 to $101,998 (25th to 75th percentile). The highest reported senior administrative assistant salary was $124,702. There are 10 employees at Ontario with the job title senior administrative assistant.