The average intern salary at Knox County was $5,272 , which is 29 percent higher than the average salary for this job in Indiana, and 24 percent higher than the national average for this job . Intern salaries at Knox County typically range from $5,415 to $5,944 (25th to 75th percentile). The highest reported intern salary was $6,058. There are 6 employees at Knox County with the job title intern.