Ricky Lee Green (December 27, 1960 – October 8, 1997) was an American serial killer who murdered at least four people in Texas between 1985 and 1986, at least two of which were killed with the help of his wife, Sharon. Convicted of all four murders and sentenced to death in one case, Green was executed at the Huntsville Unit in 1997.

Zhou Liqi (Chinese: 周立齐; born December 27, 1984) is a Chinese slacker culture influencer. He became famous in 2016 after a 2012 video went viral of him being questioned by local police in Guangxi after being arrested for stealing electric bicycles.

John Edward Robinson (born December 27, 1943) is an American convicted serial killer, kidnapper, rapist, and forger. He was found guilty and received the death penalty in 2003 for three murders committed in Kansas.

Juana Dayanara Barraza Samperio (born 27 December 1957) is a Mexican convicted serial killer and former professional wrestler known as "La Mataviejitas" ("The Old Lady Killer"). She was convicted of the murders of 16 elderly women and sentenced to 759 years in prison.

Ivan Robert Marko Milat (Croatian: [iʋan marko milat]; 27 December 1944 – 27 October 2019), commonly referred to in media as the Backpacker Murderer, was an Australian serial killer who was convicted for the abduction, assault, robbery and murder of two men and five women in New South Wales between 1989 and 1992. His modus operandi was to approach backpackers along the Hume Highway under the guise of providing them transport to areas of southern New South Wales, then take his victims into the Belanglo State Forest where he would incapacitate and murder them.