Investigator salary at Frederick County

The average investigator salary at Frederick County was $62,484 , which is 32 percent lower than the average salary for this job in Maryland, and 4 percent lower than the national average for this job . Investigator salaries at Frederick County typically range from $55,169 to $74,704 (25th to 75th percentile). The highest reported investigator salary was $92,277. There are 14 employees at Frederick County with the job title investigator.