Oh, OH, or Oh! is an interjection, often proclaiming surprise (emotion), surprise. It may refer to:

Arts and entertainment

Music

Albums

* Oh! (Girls' Generation album), ''Oh!'' (Girls' Generation album), 2010 * Oh! (ScoLoHoFo album), ''Oh!'' (ScoLoHoFo album), 2003 * ''OH (ohio)'', by Lambchop, 2008 * ''Oh!'', an EP that came with the preorders of Oh! Gravity.#"Oh! EP.", ''Oh! Gravity.'' by Switchfoot, 2006

Songs

* "O (Oh!)", 1920 by Ted Lewis, 1953 by Pee Wee Hunt * Oh (Ciara song), "Oh" (Ciara song), 2005 * Oh! (Girls' Generation song), "Oh!" (Girls' Generation song), 2010 * Oh! (Pink Lady song), "Oh!" (Pink Lady song), 1981 * Mixtape: Oh, "Oh" (Stray Kids song), 2021 * "Oh!", by Boys Noize from ''Oi Oi Oi (album), Oi Oi Oi'' * "Oh!", by The Breeders from ''Pod (The Breeders album), Pod'' * "Oh", by Dave Matthews from ''Some Devil'' * "Oh", by Fugazi from ''The Argument'' * "Oh", by Juliana Hatfield from ''Made in China (album), Made in China'' * "Oh!", by Micky Green from ''White T-Shirt'' * "Oh!", by Sleater-Kinney from ''One Beat'' * "Oh", by Spratleys Japs from ''Pony (Spratleys Japs album), Pony'' * "Oh!", by The Trudy * "Oh," by Underworld, recorded for the soundtrack to A Life Less Ordinary, 1997

Other media

* Oh! (TV channel), an Australian cable TV channel owned by Optus Television * Oxygen (TV channel), Oxygen, an American TV channel formerly called "Oh!" * Oh, a Boov alien from ''Home (2015 film), Home (2015)''

People

* Oh (surname), Korean surname romanized as "Oh" or "O" * Oh (Japanese surname), Japanese surname derived from Wang (surname)#Japan, Wang(王) * Ou (surname), Chinese and Cantonese surnames pronounced as "Oh" or "O" * Dennis Oh, Korean actor * Nadia Oh, English vocalist

Science and technology

Chemistry

* OH, hydroxyl functional group * OH⁻, hydroxide * ^•OH, hydroxyl radical * OH, the functional Alcohol (chemistry), alcohol group in a molecule

Other uses in science and technology

* OH, prefix of hominid fossils found at Olduvai Gorge * OH, designation in the Unified Soil Classification System for organic-rich clay or silt of high plasticity * Octahedral molecular geometry, O_h, the point group of octahedral molecular geometry * Ohnesorge number, a dimensionless number that relates the viscous forces to inertial and surface tension forces * Oral hygiene

Transportation

* OH, Aircraft registration#List of countries/regions and their registration prefixes and patterns, registration prefix for aircraft registered in Finland * Comair (USA), Comair (IATA airline code OH) * PSA Airlines (IATA airline code OH) * Military helicopter#Observation helicopters, Observation helicopter, in military abbreviation

Other uses

* Ohio, US (postal abbreviation) * O.H., post-nominal letters for the Brothers Hospitallers of Saint John of God {{disambiguation