Oh

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

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

• Oh! (TV channel), an Australian cable TV channel owned by Optus Television
• Oxygen, an American TV channel formerly called "Oh!"
• Oh, a Boov alien from Home (2015)
• Oh, I See, an Indonesian news magazine on Nusantara TV

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

• OH, the hydroxy functional group
• OH⁻, hydroxide anion
• ^•OH, hydroxyl radical
• OH, the alcohol class of compounds, that possess a hydroxy functional group

• 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
• 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

• OH, registration prefix for aircraft registered in Finland
• Comair (United States) (1977-2012, IATA airline code OH)
• PSA Airlines (1979-present, IATA airline code OH since 2012)
• Observation helicopter, in military abbreviation

• Ohio, US (postal abbreviation)
• O.H., post-nominal letters for the Brothers Hospitallers of Saint John of God
• OH, an abbreviation for the Orphic Hymns
• OpenHarmony

• 0H (disambiguation) (zero H)
• H0 (disambiguation)

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