Frank Scalice (; born Francesco Scalisi, Italian: [franˈtʃesko skaˈliːzi]; September 23, 1893 – June 17, 1957), also known as "Don Ciccio" and "Wacky", was an Italian-American mobster active in New York City, who led the future Gambino crime family from 1930 to 1931. He was consigliere from 1931 until his murder on June 17, 1957.

Georges-Alexandre Sarret (born Giorgio Sarrejani; 23 September 1878 – 10 April 1934) was a French criminal who was the last person to be executed in Aix-en-Provence. He was guillotined for double murder in a notorious case that involved his dissolving the bodies of his victims in sulphuric acid.

Cesare Serviatti (24 November 1880 – 13 October 1933), known as The Landru of the Tiber (Il Landru del Tevere, in Italian), was an Italian serial killer who killed at least three women he contacted through lonely hearts ads between 1928 and 1932. Convicted for these crimes, he was sentenced to death and subsequently executed.

Manuel "Manny" Pardo Jr. (September 24, 1956 – December 11, 2012) was an American serial killer and former police officer previously employed by the Florida Highway Patrol and the Sweetwater Police Department.

Patrick Wayne Kearney (born September 24, 1939), also called the Trash Bag Killer and the Freeway Killer, is an American serial killer who sexually assaulted and murdered a minimum of twenty-eight young men and boys in southern California between 1962 and 1977. Kearney often engaged in necrophilia with his victims' bodies before disemboweling and dismembering them.

Nikolas Jacob Cruz (born September 24, 1998) is an American mass murderer who fatally shot fourteen students and three staff members and injured seventeen others at Marjory Stoneman Douglas High School on February 14, 2018. In November 2022, Cruz was sentenced to life imprisonment without the possibility of parole for the shooting, which remains one of the deadliest school shootings in the United States.

Kenji "Pisuken" Kano (嘉納 健治, Kanō Kenji, September 24, 1881 – October 30, 1947) was a Japanese yakuza and boxing and mixed martial arts promoter, the founder of the International Jūkken Club (国際柔拳倶楽部) which promoted Jūkken matches between judo practitioners and boxers. He was also the founder of the Dai Nippon Boxing Association (aka Dai Nippon Kentōkai; 大日本拳闘会).

Frank LoCascio (September 24, 1932 – October 1, 2021) was an American mobster who rose to become consigliere of the Gambino crime family under the administration of John Gotti.

Georges Claude (24 September 1870 – 23 May 1960) was a French engineer and inventor. He is noted for his early work on the industrial liquefaction of air, for the invention and commercialization of neon lighting, and for a large experiment on generating energy by pumping cold seawater up from the depths.

Hans Helwig (25 September 1881 – 24 August 1952) was a German Nazi Party politician, World War I veteran, Schutzstaffel general and Nazi concentration camp commandant. An early member of the Nazi movement he fulfilled a number of roles within Nazism down the years.

Olaf Däter (born 25 September 1969 in Bremerhaven) is a German spree killer who has been dubbed as Oma-Mörder ("Granny-Killer") by the media.

David Groves, better known by his birth name Patrick David Mackay (born 25 September 1952), is believed to be one of the United Kingdom's most prolific serial killers. He was convicted of three counts of manslaughter and two additional cases that were left to lie on file.

Joan Vila Dilmé (born 26 September 1965), known as The Caretaker of Olot and The Angel of Death, is a Spanish serial killer and nursing assistant. He is responsible for at least 11 murders committed at the Fundació La Caritat in Olot between August 2009 and October 2010, with all his victims being elderly patients aged 80–96.

Kenneth Eugene Parnell (September 26, 1931 – January 21, 2008) was an American convicted sex offender, child rapist, and kidnapper infamously known for committing the abductions of 7-year-old Steven Stayner in Merced, California, in 1972 and 5-year-old Timothy White in Ukiah, California, in 1980. He was convicted in 2004 for attempting to purchase a child for sex and died in prison.

Jürgen Stroop (born Josef Stroop, 26 September 1895 – 6 March 1952) was a German SS commander and perpetrator of the Holocaust during the Nazi era, who served as SS and Police Leader in occupied Poland and Greece from 1942–1943 (in Poland) and 1943–1944 (in Greece). He held the rank of SS-Gruppenführer und Generalleutnant der Polizei from 1942–1945 (equivalent to a Heer Generalleutnant/Lt-Gen in the Wehrmacht).

Umberto "Albert" Anastasia (, Italian: [umˈbɛrto anastaˈziːa]; né Anastasio [anaˈstaːzjo]; September 26, 1902 – October 25, 1957) was an Italian-American mobster, hitman and crime boss. One of the founders of the modern American Mafia, and a co-founder and later boss of the Murder, Inc.

Commodore Abraham Whipple (September 26, 1733 – May 27, 1819) was a Continental Navy officer who served in the American Revolutionary War and co-founded Marietta, Ohio. Born near Providence, Rhode Island, Whipple chose to be a sailor early in his life and embarked on a career in the lucrative colonial trade with the West Indies, working for Moses and John Brown.

Martín de Álzaga (11 November 1755 – 6 July 1812) was a Spanish merchant and politician during the British invasions of the Río de la Plata.

Patrick Trémeau (born September 27, 1963) is a French serial rapist, active in the 11th and 20th arrondissements of Paris during the 1990s. Nicknamed The Parking Rapist, he prowled mainly at night, attacking women in underground car parks under the threat of a knife, before raping them.

Arturo Beltrán Leyva (September 27, 1961 – December 16, 2009) was a Mexican drug lord who, alongside his brothers, founded and led the Beltrán-Leyva Cartel. Prior to founding his own organization, Beltran-Leyva was a longtime high-ranking member of the Sinaloa Cartel.

Lawrence Sullivan "Sul" Ross (September 27, 1838 – January 3, 1898) was the 19th governor of Texas, a Confederate States Army general during the American Civil War, and the 4th president of the Agricultural and Mechanical College of Texas, now called Texas A&M University.

Thomas Richard Bunday (September 28, 1948 – March 15, 1983) was an American serial killer who, from 1979 to 1981, committed a series of murders of young women and girls in the city of Fairbanks, Alaska. At the time of the killings, Bunday was serving at the Eielson Air Force Base near Fairbanks, and for a long time avoided suspicion.

Carl Clauberg (28 September 1898 – 9 August 1957) was a German gynecologist who conducted medical experiments on Jewish and Romani women at Auschwitz concentration camp. He worked with Horst Schumann in X-ray sterilization experiments at Auschwitz concentration camp.

Baron Kiichirō Hiranuma (平沼 騏一郎; 28 September 1867 – 22 August 1952) was a Japanese lawyer and politician who served as Prime Minister of Japan in 1939.

Arthur Gary Bishop (September 29, 1952 – June 10, 1988) was an American serial killer and sex offender who abducted, sexually assaulted, murdered, and mutilated five young boys in Salt Lake City, Utah, between 1979 and 1983.

Paul Ogorzow (born Paul Saga; 29 September 1912 – 26 July 1941), also known as the S-Bahn Murderer, was a German serial killer and rapist who was active in Nazi-era Berlin between 1939 and 1941, during the height of the Second World War. An employee of Deutsche Reichsbahn, he exploited the regular wartime blackouts to commit numerous murders and sex crimes, mostly targeting lone female passengers travelling aboard Berlin's S-Bahn commuter rail system, and solitary housewives whose husbands had been called up for military service.

Gary Lee Sampson (September 29, 1959 – December 21, 2021) was an American bank robber and later spree killer who killed three people and was sentenced to death by a federal jury in Massachusetts.

Frederick Walter Stephen West (29 September 1941 – 1 January 1995) was an English serial killer and child molester, who committed at least twelve murders between 1967 and 1987 in Gloucestershire, England—the majority with his second wife, Rose West.

Dayton Leroy Rogers (born September 30, 1953) is an American serial killer who has been tied to the murders of at least eight women. He preferred "street" women, usually addicts, sex workers, and runaways.

Michael Lee Lockhart (September 30, 1960 – December 9, 1997) was an American serial killer who received death sentences in three states (Florida, Indiana, and Texas). He was executed on December 9, 1997, by the state of Texas.

Joshua Milton Blahyi (born 30 September 1971), better known by his nom de guerre General Butt Naked, is a Liberian preacher and philanthropist best known for being a warlord during the First Liberian Civil War. Born in Monrovia into a Krahn family, Blahyi claims that at the age of seven he was inducted as a high priest into a secret society and participated in child sacrifices along with assisting the regime of President Samuel Doe.

Eduard Vasilyevich Shemyakov (Russian: Эдуа́рд Васи́льевич Шемяко́в; born 30 September 1975), known as the Resort Maniac (Russian: Курортный маньяк, romanized: Kurortny manyak), is a Ukrainian-born Russian serial killer who killed 10 people and attempted to kill 2 others in St. Petersburg between 1996 and 1998.

Efren Saldivar (born September 30, 1969) is an American serial killer who murdered patients while working as a respiratory therapist at Adventist Health Glendale, named at that time Glendale Adventist Medical Center in Glendale, California.

Bernhard Rust (30 September 1883 – 8 May 1945) was Minister of Science, Education and National Culture (Reichserziehungsminister) in Nazi Germany. A combination of school administrator and zealous Nazi, he issued decrees, often bizarre, at every level of the German educational system to immerse German youth in Nazi ideology.