The average engineer salary at Ontario was $75,070 , which is 22 percent lower than the average salary for this job in New York, and 22 percent lower than the national average for this job . Engineer salaries at Ontario typically range from $64,476 to $82,953 (25th to 75th percentile). The highest reported engineer salary was $119,508. There are 7 employees at Ontario with the job title engineer.