Ko

KO is a knockout in various sports, such as boxing and martial arts. K.O., Ko or Kō may also refer to:

Arts and entertainment

Music

• KO (musician), Canadian musician who plays a fusion of hip hop and folk music
• K.O. (album), a 2021 album by Danna Paola
• Ko (soundtrack), for the 2011 Indian film (see below) by Harris Jayaraj
• K.O (rapper), South African rapper Ntokozo Mdluli
• Karen O (born 1978), lead singer of the rock group Yeah Yeah Yeahs
• Kevin Olusola, American cellist, beatboxer and member of a cappella group Pentatonix
• K.O. (song), a song by Pabllo Vittar
• KO (song), 2025 song by NLE Choppa
• K.O., a 2008 album by Rize
• "K.O.", a 2004 song by Smujji

Other media

• Ko (Go), in the board game Go
• Ko (film), a 2011 Indian Tamil-language action film by K. V. Anand
• Knight Online, a 2004 online role-playing game

Language

• Ko language
• Ko (kana), the romanization of the Japanese kana こ and コ
• ISO 639-1 code for the Korean language

Surname

• Ko (Korean surname)
• Gao (surname), a surname of Chinese origin romanized to Ko in Hong Kong, and in several romanizations especially in South-east Asia
• Ke (surname), a Chinese surname romanized as "Ko" in the Wade–Giles system
• Xu (surname 許), a surname of Chinese romanized as Ko in the Teochew

People

• Kō Nakata (born 1960), Japanese Islamic scholar
• Ko Simpson (born 1983), professional American football player for the Buffalo Bills
• Kevin Owens, Canadian professional wrestler
• Yi Ko (died 1171), Korean military ruler
• Karen Olivo, an American actor, theater educator, and singer

Places

• Ko Mountain, the second-highest peak in the Sikhote-Alin Mountains of Russia
• Ko. Madhepura, Nepal, a village development committee
• Ko, Lamphun, Thailand, a village and subdistrict
• Kö, an urban boulevard in Düsseldorf, Germany
• KO, a country code often associated with Kosovo (Mostly used with XK)
• Keio University, a university in Tokyo, Japan

Science and technology

• Ko, an ancient Chinese weapon also known as a dagger-axe in English
• Kō, a version of the foot plough used by the Māori people
• Gene knockout, a molecular biology genetic technique, abbreviated KO
• Knowledge organization, branch of information science
• Knowledge Organization, an academic journal published by the International Society for Knowledge Organization
• kilooctet (computing), a unit of information or computer storage
• Loadable kernel module (file extension .ko)
• Real K-theory

Transportation

• Kō Station (Aichi) on the Meitetsu Nagoya Main Line in Japan
• Kō Station (Tokushima) on the Tokushima Line in Japan
• Alaska Central Express, IATA airline designator

Other uses

• The Coca-Cola Company, stock ticker symbol and corporate internet domain ko.com
• Civic Coalition (Poland), or Koalicja Obywatelska (KO), a Polish electoral alliance
• or Civic Coalition (party), a Polish political party of the same name
• Knock-off, a counterfeit product
• Kelly Oils Ltd, a fuels merchant in Northern Ireland
• Kemetic Orthodoxy, a religion
• Contracting Officer, US government acronym KO or CO
• K.O., protagonist in OK K.O.! Let's Be Heroes
• Ko Ukumori, a character in the air combat game '
• Dukkha, the concept of unsatisfactoriness in Buddhism
• Kick-off (association football), the time or manner of start of play
• Kō, Japanese for incense; see Japanese incense
• Kōdō, the art of appreciating Japanese incense
• Momofuku Ko, a New York restaurant