Robert Lee Yates Jr. (born May 27, 1952), also known as the Spokane Serial Killer and the Grocery Bag Killer, is an American serial killer, kidnapper, rapist, necrophile, and former U.S.

Elisabeth Marschall (May 27, 1886 – May 3, 1947) was the head nurse (Oberschwester) at the Nazi Ravensbrück concentration camp and was executed after the Hamburg Ravensbrück trials.

Thomas Neill Cream (27 May 1850 – 15 November 1892), also known as the Lambeth Poisoner, was a Scottish-Canadian medical doctor and serial killer who poisoned his victims with strychnine. Cream murdered up to ten people in three countries, targeting mostly lower-class women, sex workers and pregnant women seeking abortions.

Henry-Clément Sanson (27 May 1799 – 25 January 1889) was a French executioner. He held the position of Royal Executioner of the City of Paris, serving King Louis-Philippe I from 1840 to 1847.

Michael Franzese Sr. () (né Grillo; born May 27, 1951) is an American former mobster who was a caporegime in the Colombo crime family in New York City, and son of former underboss Sonny Franzese.

Wayne Bertram Williams (born May 27, 1958) is an American convicted murderer and suspected serial killer who is serving life imprisonment for the 1981 killings of two men in Atlanta, Georgia. Although never tried for the additional murders, he is also believed to be responsible for at least twenty-four of the thirty Atlanta murders of 1979–1981, also known as the Atlanta Child Murders.

Ernest Martin "Ernie" Ingenito (May 27, 1924 – October 7, 1995) was an American spree killer who shot nine people, his wife Theresa Mazzoli and her family, killing five and injuring four, on November 17, 1950, in Franklin Township and Minotola, New Jersey.

Arbi Alautdinovich Barayev (Chechen: Арби Алаутдинович Бараев; 27 May 1974 – 22 June 2001) was a Chechen warlord who in 1996 became the founder and first leader of the Special Purpose Islamic Regiment (SPIR) in Chechnya.

Emil Max Hödel (27 May 1857 – 16 August 1878) was a German tinsmith and anarchist from Leipzig. He is best known for committing the Hödel assassination attempt on Kaiser Wilhelm I, one of the first instances of propaganda by the deed in history.

Henry Alfred Kissinger (May 27, 1923 – November 29, 2023) was an American diplomat, political scientist, and politician. He served as the 7th national security advisor from 1969 to 1975, followed by being the 56th United States secretary of state from 1973 to 1977.