Most notorious serial killers
Jack the Ripper was an unidentified serial killer active in and around the impoverished Whitechapel district of London, England, in 1888.
Jeffrey Lionel Dahmer (; May 21, 1960 – November 28, 1994), also known as the Milwaukee Cannibal or the Milwaukee Monster, was an American serial killer and sex offender who killed and dismembered seventeen males between 1978 and 1991.
Ricardo "Richard" Leyva Muñoz Ramirez (; February 29, 1960 – June 7, 2013), dubbed the Night Stalker, the Walk-In Killer, and the Valley Intruder since his attacks were first clustered in the San Gabriel Valley, was an American serial killer whose crime spree took place in California between June 1984 and August 1985.
The Zodiac Killer is the pseudonym of an unidentified serial killer, who operated in Northern California in the late 1960s. The case has been described as the most famous unsolved murder case in American history.
Aileen Carol Wuornos (; born Pittman; February 29, 1956 – October 9, 2002) was an American serial killer. In 1989–1990, while engaging in street prostitution along highways in Florida, she shot dead and robbed seven of her male clients.
John Wayne Gacy (March 17, 1942 – May 10, 1994) was an American serial killer and murdered at least 33 young men and boys in Norwood Park Township, near Chicago, Illinois.
Gary Leon Ridgway (born February 18, 1949) is an American serial killer known as the Green River Killer. He was initially convicted of 48 separate murders. As part of his plea bargain, another conviction was added, bringing the total number of convictions to 49, making him the second most prolific serial killer in United States history.
Pedro Alonso López (born 8 October 1948), also known as The Monster of the Andes, is a Colombian serial killer who murdered a minimum of 110 people, mostly young women and girls, from 1969 to 1980.
Joachim Georg Kroll (17 April 1933 – 1 July 1991) was a German serial killer who murdered a minimum of eight women and young girls in the Ruhr metropolitan region from 1955 until his arrest on 3 July 1976.
Gilles de Rais (c. 1405 – 26 October 1440), Baron de Rais (French: [də ʁɛ]), was a knight and lord from Brittany, Anjou and Poitou, a leader in the French army, and a companion-in-arms of Joan of Arc.
Countess Elizabeth Báthory de Ecsed was a Hungarian noblewoman and alleged serial killer from the family of Báthory, who owned land in the Kingdom of Hungary (now Slovakia). Báthory and four of her servants were accused of torturing and killing hundreds of girls and women between 1590 and 1610.