Keith Allen Raniere ( ran-YAIR-ee; born August 26, 1960) is an American cult leader who was convicted of a pattern of racketeering activity, including human trafficking, sex offenses, and fraud. Raniere co-founded NXIVM, a purported self-help multi-level marketing company offering personal development seminars and headquartered in Albany, New York.

Elisabeth Wery (26 August 1920 – 16 October 2006) was a Dutch Nazi collaborator who is best known in the Netherlands for collaborating with the Nazi Sicherheitsdienst (SD) to locate as many Dutch Jews as possible and have them delivered to Nazi concentration camps during the occupation.

Theodore L. "Teddy" Roe (August 26, 1898 – August 4, 1952) was a Black American organized crime figure who led an illegal gambling empire in South Side, Chicago during the 1940s and early 1950s.

Benjamin Thomas Atkins (August 26, 1968 – September 17, 1997), also known as The Woodward Corridor Killer, was an American serial killer and rapist who raped and tortured 12 women, murdering 11 of them in Highland Park and Detroit, Michigan, during a period of eight months between December 1991 and August 1992. Atkins was apprehended by police with the assistance the sole survior of an attack, who rode with officers around the area and was able to identify Atkins as her attacker.

Ryan Scott Blinston (born August 26, 1983) is an American spree killer and arsonist who murdered three women in Oroville, California, between May and June 2020. His modus operandi typically consisted of murdering clients he worked for at his tree-trimming job.

Carol Mary Bundy (née Peters; August 26, 1942 – December 9, 2003) was an American double murderer and suspected serial killer. Bundy and Doug Clark became collectively known as the Sunset Strip Killers after being convicted of a series of lust murders in Los Angeles during the late spring and early summer of 1980.

Peter Britton Tobin (27 August 1946 – 8 October 2022) was a Scottish serial killer and sex offender who served a whole life order for three murders committed between 1991 and 2006. Police also investigated Tobin over the deaths and disappearances of other young women and girls.

Paul Kenneth Bernardo (born August 27, 1964), also known as Paul Jason Teale, is a Canadian serial rapist and serial killer dubbed the Scarborough Rapist, the Schoolgirl Killer and, together with his former fiancée and later wife Karla Homolka, one of the Ken and Barbie Killers. He initially committed a series of rapes in Scarborough, Ontario, a district of Toronto, between 1986 and 1990, before committing three murders with Homolka between 1990 and 1992; among these victims was Karla's younger sister, Tammy Homolka.

Talduwe Ratugama Rallage Weris Singho, better known as Talduwe Somarama Thero (27 August 1915 – 6 July 1962) was a Ceylonese Buddhist priest who shot and killed S. W.

Morris Levy (born Moishe Levy; August 27, 1927 – May 21, 1990) was an American entrepreneur in the fields of jazz clubs, music publishing, and the independent record industry. Levy was cofounder and owner of Roulette Records, founding partner of the Birdland jazz club and the Roulette Room.

Gundolf Köhler (27 August 1959 – 26 September 1980) was a German far-right terrorist who planted a bomb at the 1980 Oktoberfest in Munich, killing 13 people (including himself) and injuring more than 200 in what is known as the Oktoberfest bombing.

Rustaman Makhauri (born 1978) is a Chechen military commander and a close associate of Doku Umarov, the anti-Russian underground Chechen leader. He is suspected of being responsible for a series of attacks against the forces loyal to the governments in Chechnya and neighboring Ingushetia.

Edward Theodore Gein (; August 27, 1906 – July 26, 1984), also known as the Butcher of Plainfield and the Plainfield Ghoul, was an American murderer and body snatcher. His crimes, committed around his hometown of Plainfield, Wisconsin, gathered widespread notoriety in 1957 after authorities discovered that he stole corpses from local graveyards and fashioned keepsakes from their bones and skin.

Zheng Chenggong (Chinese: 鄭成功; pinyin: Zhèng Chénggōng; Pe̍h-ōe-jī: Tēⁿ Sêng-kong; Tâi-lô: Tēnn Sîng-kong; 27 August 1624 – 23 June 1662), born Zheng Sen (鄭森) and better known internationally by his honorific title Koxinga (國姓爺), was a Southern Ming general who resisted the Qing conquest of China in the 17th century and expelled the Dutch from Taiwan, founding the Kingdom of Tungning.

Elias Abuelazam (; Arabic: الياس أبو العظام; Hebrew: אליאס אבו אל עזאם; born August 29, 1976), also known as Elias Abullazam, is an Arab-Israeli convicted murderer, and a suspect of serial killings and stabbings with a racial motive. He is suspected in a string of eighteen stabbing attacks from May to August 2010 which resulted in five deaths.

Heather Irene Pressdee (born August 28, 1982) is an American registered nurse and convicted serial killer. She is serving life imprisonment after being convicted of murdering three patients by lethal injection.

Agustín Ramón Martínez Martínez (28 August 1961 – 18 May 2024), known as Israeli Soldier (Spanish: Soldado Israelí), was a Paraguayan-Israeli serial killer and fraudster who killed at least six people in Argentina and Paraguay from 1993 to 2018, but was suspected in other murders. For his last murder, he was sentenced to 40 years' imprisonment.

Anne "Dieu-Le-Veut" de Graaf also called Marie-Anne or Marianne (28 August 1661 – 11 January 1710) was a French pirate. Alongside Jacquotte Delahaye, she was one of very few female buccaneers.

Bonnie Lu Nettles (née Trousdale; August 29, 1927 – June 19, 1985), later known as Ti (; TEE), was an American religious leader and nurse who was co-founder and co-leader along with Marshall Applewhite of the Heaven's Gate new religious movement. Nettles died of melanoma metastatic to the liver in 1985 in Dallas, Texas, twelve years before the group's mass suicide in March 1997.

Frédéric Ntumi Bintsamou (born 29 August 1964), also known as Pastor Ntumi, is a Congolese Protestant clergyman and former warlord. He was the leader of the "semi-religious" rebel group the Ninjas, which led a civil war in Congo-Brazzaville.

Richard Angelo (born August 29, 1962) is an American serial killer and former nurse who operated within Long Island and West Islip, New York. In 1989, he was convicted of murdering several of his patients and sentenced to 50-years-to-life in prison.

Kiyotaka Katsuta (勝田 清孝, Katsuta Kiyotaka; August 29, 1948 – November 30, 2000) was a Japanese serial killer and thief.

On May 21, 1998, 15-year-old freshman student Kipland "Kip" Kinkel opened fire with a semi-automatic rifle in the cafeteria of Thurston High School in Springfield, Oregon, United States, killing two of his classmates and wounding 25 others. The day before, he killed his parents at the family home, following his suspension pending an expulsion hearing after he admitted to school officials that he was keeping a stolen handgun in his locker.

Robert Milligan (19 August 1746 – 21 May 1809) was a Scottish merchant, ship-owner and slave trader who was the driving force behind the construction and initial statutory sectoral monopoly of the West India Docks in London. From 1768 to 1779 Milligan was a merchant in Kingston, Jamaica.

Lonnie David Franklin Jr. (August 30, 1952 – March 28, 2020), better known by the nickname Grim Sleeper, was an American serial killer who was responsible for at least ten murders and one attempted murder in Los Angeles, California from 1984 to 2007.

Jack Owen Spillman III (born August 30, 1969) is an American rapist and serial killer from Spokane, Washington. He is known as the Werewolf Butcher.

Dean Phillip Carter (born August 30, 1955) is an American convicted spree killer and serial rapist who was sentenced to death for the murders of four women in California in April 1984. He has also been implicated in the death of a fifth woman.

Mario Sandoval was an Argentinian police officer and academic who is considered to be one of the most brutal torturers during the Argentine dictatorship of 1976-1983.

Sigifredo Nájera Talamantes (31 August 1980 – 7 September 2015), commonly referred to by his alias El Canicón, was a Mexican drug lord and high-ranking leader of Los Zetas.

Leroy Eldridge Cleaver (August 31, 1935 – May 1, 1998) was an African American writer and political activist, fashion designer, convicted rapist and an early leader of the Black Panther Party serving as Minister of Information, and while in exile, Head of the International Section of the Panthers. As editor of the official Panthers' newspaper, The Black Panther, Cleaver's influence on the direction of the party was rivaled only by founders Huey P.

Ramón Eduardo Arellano Félix (August 31, 1964 – February 10, 2002) was a Mexican drug lord who alongside his brothers founded and led the Tijuana Cartel (a.k.a. the Arellano-Félix Organization).

Commodus (; Latin: [ˈkɔmmɔdʊs]; 31 August 161 – 31 December 192) was Roman emperor from 177 to 192, first serving as nominal co-emperor under his father Marcus Aurelius and then ruling alone from 180. Commodus's sole reign is commonly thought to mark the end of the Pax Romana, a golden age of peace and prosperity in the history of the Roman Empire.

Gaius Julius Caesar Augustus Germanicus (31 August AD 12 – 24 January AD 41), also called Gaius and Caligula (), was the third Roman emperor, ruling from AD 37 until his assassination in AD 41. He was the son of the Roman general Germanicus and Augustus' granddaughter Agrippina the Elder, members of the first ruling family of the Roman Empire.