Top 50 Most Dangerous and Successful Serial Killers in the World

The complex nature of serial killers, their crimes, discrepancies caused by geographic location and/or time, and the investigations related to these persons results in difficulties in organization and ranking. This is not a reflection of an individual's overall rank which may or may not vary depending on personal opinion concerning the nature and circumstances of their crimes. You may have heard of Ted Bundy or Wayne Gacy, but you'll be surprised where they show up on this list!