The United States leads globally in the number of documented serial killers, with a total surpassing the combined count of the next ten highest countries.
In the U.S., few serial killers achieve lasting fame, unlike England's historic and modern cases such as Jack the Ripper and Amelia Dyer.
South Africa (#6) and Japan (#4 and leading in Asia), showcase a range of serial killers from early 1900s to contemporary notorious figures.