- Orchestra JB
- Orchestra Marrabenta Star de Moçambique feat. Wazimbo
- Orchestra Morphine
- Orchestra Mozart
- Orchestra of Syrian Musicians, The
- Orchestra of the Mariinsky Theatre, Gergiev, Valery Abisalovich
- Orchestra of the Royal Opera House, Covent Garden
- Orchestra Rosichino (Grande Orchestra Rosichino)
- Orchestra Super Mazembe
- Orchestra, Big Time
- Orchestra, Bone Poets
- Orchestra, Chennai
- Orchestra, Moka Efti (Music from the 20s)
- Orchestra, Puente, Tito's
- Orchestral Manoeuvres in the Dark
- Orchestre de l’Opéra national de Paris, Prêtre, Georges
- Orchestre de la Société des Concerts du Conservatoire, Cluytens, André
- Orchestre de la Suisse Romande, Ansermet, Ernest
- Orchestre de la Suisse Romande, Ansermet, Ernest
- Orchestre de Paris, Karajan, Herbert von
- Orchestre Ducoin
- Orchestre International du Vetex (Belgian brassband)
- Orchestre National de Barbès
- Orchestre national de France, Maazel, Lorin
- Orchestre national du Capitole de Toulouse, Plasson, Michel
- Orchestre national du Capitole de Toulouse, Plasson, Michel
- Orchid (United States screamo band)
- Orchid (American doom metal group)
- Orchids, The (Sarah Records)
- Orchids, The (Kim Fowley managed group)
- Orcivus
- Orcustus (Norwegian black metal)
- Ord, Boris
- Ord, Maren
- Orden Mundial
- Orden Ogan
- Ordén, Janne
- Order (Norwegian Black Metal)
- Order From Chaos
- Order of Apollyon, The
- Order of Elijah, The (Joplin, MO)
- Order of Ennead
- Order of Israfel, The
- Order of the Ebon Hand (Greece / Black Metal)
- Order of the Fly, The
- Order of Týr
- Order of Voices
- Order89 (Parisian darkwave trio)
- Ordinaires, The (USA band)
- Ordinance (USA progressive death metal)
- Ordinarius
- Ordinary Boys, The
- Ordinary Elephant
- Ordinary People (New Jersey)
- Ordinary Surfers
- Ordinary Time
- Ordo Equilibrio
- Ordo Rosarius Equilibrio
- Ordo Rosarius Equilibrio feat. Spiritual Front
- Ordog (doom metal band from Finland)
- Ordonówna, Hanka
- Ordorika, Ruper
- Ordos (Swedish stoner/metal)
- Oré (French hip-hop/chanson/neo soul rapper/vocalist)
- Orealis
- Oregon
- Oregon Bike Trails
- Oreia, Hot e
- Oreiro, Natalia
- Oreja (UK producer/DJ Paul Dolby aka Seiji)
- Oreja de Van Gogh, La
- Orellana Lucca
- Orellana, Raúl (DJ & producer)
- Orellana, Roberto
- Orelle (Italian artist Elisabetta Pasquale)
- Orelsan
- Orelsan & Gringe
- Orelsan & Toxic Avenger, The
- Orelsan feat. Cordae
- Orelsan feat. Damso
- Orelsan feat. Gims
- Orelsan feat. Gringe
- Orelsan feat. Ibeyi
- Orelsan feat. Nekfeu & Rascal, Dizzee
- Orelsan feat. Neptunes, The
- Orelsan feat. Skread
- Orelsan feat. Stromae
- Orelsan feat. Thal, Ron "Bumblefoot"
- Oremuz
- Oren, Foreign
