The average intern salary at Eaton County was $6,714 , which is 104 percent higher than the average salary for this job in Michigan, and 58 percent higher than the national average for this job . Intern salaries at Eaton County typically range from $4,150 to $9,190 (25th to 75th percentile). The highest reported intern salary was $9,190. There are 3 employees at Eaton County with the job title intern.