List of serial killers by number of victims
A serial killer is defined as a person who kills three or more people, in three or more separate events over a period of time. There are gaps of time in between the killings, which may comprise of a few hours up to many years. This list shows serial killers in order of how many victims they had. In many cases, the exact number of victims assigned to a serial killer is not exactly known, and even if that person is convicted of a few, there can be the possibility that he/she killed many more.
The second column in the table states the number of victims that were definitely assigned to that particular serial killer. The third column states the number of other possible victims that the killer could also have murdered. Some of these crimes are yet to be solved, but have been included because they are notorious or clearly the work of a serial killer, despite nobody being caught.
| Name | Country | Proven Victims (either in court, by detailed confession, or according to most scholars) | Possible Victims | Notes |
| Thug Behram | India | 0 | 931 | from 1791 to 1830 – He confessed to 125 murders, and reported being present at 987. |
| Elizabeth Báthory | Hungary | 100–200 | 200–600 | Born 1560, died 1614; accused of murdering about 600 people, but there was no public trial. |
| Luis Garavito | Colombia | 195 | 200–6700+ | Targeted young boys, arrested in 1987. |
| Pedro López | Colombia | 110 | 300 | Targeted girls, arrested in 1980. |
| Harold Shipman | United Kingdom | 15–215 | 250+ | Targeted his hospital patients, many of whom were elderly women. Caught when Kathleen Grundy died suddenly in his care, and her will had been amended to benefit him. Killed patients with lethal injections of diamorphine. |
| Henry Lee Lucas | United States | 11 | 2–200 | Born 1936, died 2001. Confessed to about 3,000 murders, convicted of 11, though some were dubious. |
| Gilles de Rais | France | 140 | 140+ | Testimony gained under torture and confession under threat, as was customary. |
| John Wesley Hardin | United States | 10 | 3 (?) | From 1868 to 1877 – claimed in autobiography to have committed 44 killings. |
| William Preston Longley | United States | 7 | 0 | From 1868 to 1877 – claimed to have committed 32 killings. |
| H. H. Holmes | United States | 1 | 9 | Confessed to 27 murders, though some of his "victims" were still alive. |
| Johann Otto Hoch | United States | 1 | 15 (?) | Active from 1888/1891 to 1904. Hanged for 1 murder in Chicago, 1906. |
| Billy Gohl | United States | 2 | 40 (alleged) | Alleged to have committed 40 murders. Convicted of 2 in 1913. |
| Carl Panzram | United States | 4 | 3 | From 1920 to 1928 – claimed to have committed over 22 killings. |
| Hu Wanlin | China | 196 | 196 | Sentenced to 15 years on 1 October 2000. |
| John Bodkin Adams | United Kingdom | 0 | 163+ | Controversially acquitted of one murder in 1957; suspected in 163 others. |
| Randy Steven Kraft | United States | 16 | 67–100 | Convicted on 15 counts of murder; left a cryptic list of 65 murders. |
| Ted Bundy | United States | 30–36 | 100+ | Estimated to have killed more than 100. |
| John S. Williams | United States | 11 | 7+ | 1921 trial – found guilty. Only white man convicted for killing Black peons between 1866–1966. |
| Andrei Chikatilo | Soviet Union/Russia | 53 | 56 | Convicted of the murder of 52 women and children between 1978 and 1990. |
| Anatoly Onoprienko | Ukraine | 52 | 52+ | Convicted of 52 murders between 1989 and 1996. |
| Ahmad Suradji | Indonesia | 42 | 42 | Admitted to murdering 42 girls and women between 1986 and 1997. |
| Zodiac Killer | United States | 5 | 37 | Targeted young couples, was never apprehended. |
| Moninder Singh Pandher | India | 0 | 30+ | Investigation underway after discovery of remains in 2006. |
| Gary Ridgway | United States | 49 | 71–90 | Known as the Green River Killer; confessed to killing 48 women. |
| Belle Gunness | United States | 40 | 40+ | Of La Porte, Indiana; possibly Los Angeles, California. |
| Charles Cullen | United States | 29 | 400+ | Nurse in New Jersey and Pennsylvania; murdered patients between 1988 and 2003. |
| John Wayne Gacy | United States | 33 | 45+ | The “Killer Clown”; buried bodies under his Chicago home. |
| Joseph Paul Franklin | United States | 8 | 20 | Confessed to 20 murders and several attempted murders. |
| Jeffrey Dahmer | United States | 17 | 17 | Cannibalized some victims; kept body parts in freezer. |
| Dennis Nilsen | United Kingdom | 15 | 15 | Picked up young men in London between 1978–1982, dismembered them. |
| Herbert Mullin | United States | 13 | 13 | Claimed divine voices ordered him to kill to prevent earthquakes. |
| Kaspars Petrovs | Latvia | 13 | 38+ | Strangled elderly residents of Riga in 2003. |
| Fred West and Rosemary West | United Kingdom | 12 | 12+ | Targeted young females; buried victims around their home. |
| John Wayne Glover | Australia | 12 | 12 | Targeted elderly women. |
| Edmund Kemper | United States | 10 | 10 | Killed grandparents and co-eds; known as the “Co-ed Killer.” |
| Dennis Rader | United States | 10 | 10 | Known as the BTK Killer; active in Wichita, Kansas, 1974–1991. |
| Ivan Milat | Australia | 7 | 7 | Backpacker murders. |
| Christopher Worrell | Australia | 7 | 7 | Died before capture. |
| James Miller | Australia | 6 | 7 | Sentenced to life imprisonment for 6 murders. |
| Robert Pickton | Canada | 6 | 49+ | Charged with at least 6 murders, possibly over 29. |
| Kristen Gilbert | United States | 5 | 5+ | Nurse who murdered patients; sentenced to life. |
| Jack the Ripper | United Kingdom | 5 | 4–16 | Identity never discovered; preyed on prostitutes in Whitechapel, 1888. |
| Ian Brady and Myra Hindley | United Kingdom | 5 | 5 | The “Moors Murderers”; abducted and killed children. |
| “Suffolk Ripper” | United Kingdom | 5 | 5–14 | Convicted of five prostitute murders in Ipswich, 2006. |
| Peter Woodcock | Canada | 4 | 4 | Sexual sadist; killed children in Toronto, 1950s. |
| Lam Kor-wan | Hong Kong | 4 | 4 | Taxi driver; kept body parts in parents’ home. |
| Eddie Leonski | Australia | 3 | 3 | “Brownout Strangler”; hanged in 1942. |
| Danny Rolling | United States | 5 | 5+ | “Gainesville Ripper”; murdered 5 students in 1990. |