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

• 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
• Gesche Gottfried - poisoned 15 in Bremen between 1813 and 1827; executed 1831
• Karl Grossmann - killed women and sold their flesh on the blackmarket
• 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

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

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

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
• 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 - aka 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
• Myra Hindley - (d. 2002) one of the Moors Murderers, with Ian Brady
• Colin Ireland - The Gay Slayer or Fairy Liquidator
• Jack the Ripper - infamous Victorian killer
• Michael Lupo - the so-called Wolfman, 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

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
• 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
• Hillside Strangler - actually two men, Kenneth Bianchi and Angelo Buono, Jr.
• 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
• 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

Currently on trial

• 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 black women.

Unidentified serial killers

• The Axeman of New Orleans (USA)
• the BTK killer (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.