This is a list of serial killers, by their country of origin or activity.

List by country

Australia

• Martin Bryant, Port Arthur massacre killed 35 locals and tourists
• Eddie Leonski, the "Brownout Murderer" killed at least 4
• Ivan Milat , the "backpack-murderer" killed at least 7 tourists

Belgium

• Marc Dutroux - Belgian child molester and killer

Brazil

• Marcelo Costa de Andrade
• Francisco de Assis Pereira - Brazilian serial killer, known as the maniaco do parque (the park maniac)

Canada

• Paul Bernardo - Canada's most famous serial killer, who killed two teenage school girls, with his wife Karla Homolka, and was also known as the Scarborough Rapist
• Clifford Olsen - murdered eleven children

Colombia

• Pedro Lopez - Apocryphal with 300 victims

Ecuador

• Daniel Barbosa - The Beast Of The Andes

France

• Michel Fourniret
• Henri Désiré Landru
• Émile Louis - preyed on young handicapped women
• Gilles de Rais - (d. 1440), French demonolator and child-killer
• Marcel Petiot - Doctor who killed 63 would-be refugees from the Nazis

Germany

• Karl Denke - cannibal
• Adolf Seefeld - known as "uncle tick-tack" poisoned 19 young boys between 1933 and 1935
• Gesche Gottfried - poisoned 15 in Bremen between 1813 and 1827; executed 1831
• Karl Grossmann - killed women and sold their flesh on the blackmarket
• Fritz Honka killed 4 prostitutes in hamburg
• Fritz Haarmann - similar to Grossman, but preyed on boys
• Joachim Georg Kroll - claimed thirteen victims over three-decades
• Peter Kürten - the Vampire of Düsseldorf
• Bruno Ludke - mental defective who claimed to have killed 80 people
• Peter Stubbe - werewolf who killed 16 people
• Thomas Runge - Serialkiller in Berlin in the 1990´s
• Jürgen Bartsch

Hong Kong

• Lam Kor-Wan - taxi driver, killed 4 women and scrapped their sex organs

Hungary

• Erzsébet Báthory - believed to have killed 600 victims
• Bela Kiss - escaped justice in the confusion of World War 1

India

• Charles Sobhraj, who preyed on Western tourists in Southeast Asia in the 1970s
• Thug Behram, leader of the Thugee cult in India, found guilty of 931 individual murders

Japan

• Tsutomu Miyazaki - the "Otaku Killer", killed 4 preschool-age Japanese girls
• Kiyoshi Okubo
• Sakakibara
• Syoko Asahara

Mexico

• Abdul Latif Sharif - Egyptian alleged to be responsible for dozens of murders in Ciudad Juárez, Mexico

Netherlands

• Willem van Eijk - "the beast of Harkstede", killed several women.

Pakistan

• Javed Iqbal, killed 100 boys in Pakistan

Poland

• Zdzislaw Marchwicki

Romania

• Vera Renczi - The 35 bodies in her cellar may have influenced the writing of Joseph Kesselring's Arsenic and Old Lace
• Ion Ramaru - 4 women killed, 6 women almost killed, 5 women raped, few attacks between 1970 and 1971.Aparently he his father had also killed few women around 1944, but his guilt could only be proven 28 years later when he died.Hence the expresion, like father like son.

Russia

• Lavrenty Beria - (1899 - 1953) Russian official and alleged serial killer
• Andrei Chikatilo - the 'Rostov Ripper'

South Korea

• Yoo Young-Chul -- killed and ate about 20 people, mainly rich elderly men and prostitutes

Sweden

• Thomas Quick

UK

• Beverley Allitt - the Angel Of Death. Paediatric nurse who killed 13 patients and injured others in 1991
• Mary Bell - 10-year old killer, who killed two
• Robert Black - schoolgirl killer
• Ian Brady - one of the Moors Murderers, with Myra Hindley
• John Childs - burned the bodies of his six victims, jailed 1980
• John Christie - the necrophile, who lived at 10 Rillington Place
• Mary Ann Cotton - British Victorian killer, said to have taken more than 20 victims
• Thomas Neill Cream - the Lambeth Poisoner, began his killing spree in the United States before moving to London
• Peter George Dinsdale - also known as Bruce Lee, the prolific Hull arsonist
• Kenneth Erskine - the Stockwell Strangler, jailed in 1988 for murdering seven pensioners
• John George Haigh - the Acid Bath Murderer or Vampire of London
• Anthony Hardy - the Camden Ripper
• Myra Hindley - one of the Moors Murderers, with Ian Brady
• Colin Ireland - the Gay Slayer or Fairy Liquidator
• Jack the Ripper - unidentified Victorian killer
• Michael Lupo - the Wolf Man, originally from Italy
• Patrick Mackay - confessed to killing 11 people
• Robert Mawdsley - serial killer of four. Killed three in prison and dubbed Hannibal the Cannibal
• Peter Moore - businessman who killed men at random in Wales.
• Donald Neilson - the Black Panther
• Dennis Nilsen - British serial killer of 15 (possibly 16)
• Mark Rowntree - 19 year old psychopath who killed 4 people at random
• Harold Frederick Shipman - British doctor convicted of 15 murders. A later inquiry stated he had killed at least 215 and possibly up to 457 people over a 25 year period
• John Straffen - child-killer and Britain's longest serving prisoner.
• Peter Sutcliffe - the Yorkshire Ripper
• Fred and Rose West - the House of Horrors murderers in Gloucester
• Graham Young - the Teacup Poisoner, (1947-1990) who killed three
• Peter Bryan - mental patient who killed three and ate the brain of his second victim

Ukraine

• Anatoly Onoprienko - Ukrainian serial killer known as "the Terminator." Murdered 52 people from 1989 until his capture in 1996

USA

• David Berkowitz - known as the "Son of Sam"
• The Boston Strangler - allegedly Albert DeSalvo, though disputed
• William Bonin - with several accomplices, claimed the lives of twenty boys in California
• Ted Bundy - law student who raped and murdered over 30 women in several states
• Dean Corll - committed the Houston Mass Murders with Elmer Wayne Henley and David Brooks
• Juan Corona - Mexican immigrant who killed 25 people in the space of just six-weeks
• Jeffrey Dahmer - Milwaukee cannibal who kept heads, skulls and body parts in his apartment
• Glennon Engleman - mediocre St. Louis dentist who shot and bombed his way to financial success
• Albert Fish - sadist and pedophile who cannibalised a 12-year-old girl
• John Wayne Gacy - the 'Killer Clown' who kept bodies buried under his Chicago home
• Ed Gein. Elements of Gein's life and crimes have inspired, at least in part The Silence of the Lambs, Psycho, and The Texas Chainsaw Massacre
• Gary M. Heidnik - serial killer from the Philadelphia area.
• Hillside Strangler - actually two men, Kenneth Bianchi and Angelo Buono, Jr.
• Patrick Kearney - necrophile who butchered 28 men in California
• Edmund Kemper - started killing when he was aged fifteen
• Randy Steven Kraft - murdered as many as 68 young men in California
• Leonard Lake and Charles Ng - ex-marines and survivalists who collected female slaves
• Derrick Todd Lee - aka the Baton Rouge Serial Killer
• Eddie Leonski - the Brownout Strangler
• Henry Lee Lucas - confessed to hundreds of murders, although most confessions were false
• Charles Manson - found guilty of planning murders and ordering a group of followers to execute his plans, although he was not proven to have been present during any of the murders
• Herman Mudgett, aka Dr. H. H. Holmes, active 1890-1894, during Chicago's 1893 World Columbian Exposition.
• Herbert Mullin - schizophrenic who killed people to prevent earthquakes
• Earle Nelson - Necrophiliac serial killer dubbed "Gorilla Man"
• Jesse Pomeroy - teenaged psychopath who killed two children
• Dorothea Puente - killed and robbed nine elderly people
• Richard Ramirez - the 'Night Stalker' who terrorized Los Angeles in 1986
• Angel Maturino Resendiz - killed nine people in Texas, Kentucky, and Illinois
• Gary Ridgway - arrested in November, 2001 for The Green River Killer murders
• John Edward Robinson - so-called 'Cyber Sex Killer' who lured victims through the internet
• Danny Rolling - pleaded guilty to butchering five students in Florida
• Arthur Shawcross - the Genesee River Killer
• Charles Starkweather and Caril Ann Fugate - "Natural Born Killers"
• Otis Toole - Henry Lee Lucas's accomplice. Convicted of six murders in Florida
• Jane Toppan - 19th Century nurse who killed over thirty patients
• Coral Eugene Watts - killed dozens of women in Texas and Michigan
• Wayne Williams - convicted of the Atlanta Child Murders, disputed
• Aileen Wuornos - rare female serial killer who shot dead six men in Florida
• Bobby Joe McCauley - hitchiker schizophrenic who murdered 7 (possibly 15) prostitutes [1]

Currently arrested or on trial

• The BTK killer -- Dennis L. Rader has been arrested on suspicion for committing these crimes (USA)
• Robert Pickton on trial in British Columbia accused in the deaths of 15 women and suspected in up to 54.
• Greg Westann currently on trial in Myanmar for the killing of 14 women.

Unidentified serial killers

• The Axeman of New Orleans (USA)
• Bible John (UK)
• The Cleveland Torso Murderer, aka "The Mad Butcher of Kingsbury Run" (USA)
• Jack the Ripper, aka "The Whitechapel Murderer" (UK)
• Jack the Stripper (UK)
• The Zodiac Killer (USA)

For the Unabomber, Theodore Kaczynski, see List of terrorist incidents.