The average engineer salary at Allen County was $98,695 , which is 6 percent higher than the average salary for this job in Indiana, and 3 percent higher than the national average for this job . Engineer salaries at Allen County typically range from $77,406 to $119,985 (25th to 75th percentile). The highest reported engineer salary was $119,984. There are 2 employees at Allen County with the job title engineer.