- Ol’ Burger Beats
- Ol’ Dirty Bastard (Wu‐Tang founder, NYC rapper/producer)
- Ol’ Dirty Bastard & Kelis
- Ol’ Dirty Bastard & Wray, Nicole
- Ol’ Dirty Bastard feat. Kelis
- Ol’ Dirty Bastard feat. Kelis
- Ol’ Dirty Bastard feat. Method Man
- Ol’ Dirty Bastard feat. RZA
- Ol’ Kainry
- Ol’ Kainry & Jango Jack
- Ola (Ola Svensson)
- Ola (British)
- Ola & the Janglers
- Ola Podrida
- Ola que quería ser Chau, La
- Oladipo, Victor (NBA basketball player performed on The Masked Singer TV show)
- Oladokum, Joy
- Oladokum, Joy ft. McRae, Jensen
- Oladokum, Joy with Penny and Sparrow
- Oladokun, Joy
- Oladokun, Joy & Stapleton, Chris
- Oladokun, Joy feat. Stapleton, Chris
- Oladokun, Joy ft. McRae, Jensen
- Oladokun, Joy with Penny and Sparrow
- Olaf
- Olaf & Hans (Folk Pop Party)
- Oláh Gergő
- Oláh, Ibolya
- Olaisen, Ylva (Norwegian pop artist)
- Olaisen, Ylva & Brenner, Stig
- Olaiya, Victor (Nigerian trumpeter)
- Olakira (Adefemi Ebenezer, Nigerian producer)
- Olam Ein Sof ("Olam Ein Sof" translates to "World of the Infinites")
- Olamide (Nigerian Hip Hop artist)
- Olamide feat. Phyno
- OLAN (electronic/alternative singer‐songwriter, producer, multi‐instrumentalist)
- Olander, Jeremy
- Olaniran, Tunde
- Olare Utseoritsenere Prosper
- Olari, Silvia
- Olasoji, Wale
- Olathia (Heavy metal band from Cleveland, Ohio)
- Olatuja, Michael (UK electric and acoustic bassist/composer, based in New York)
- Olatunji (alias for Olatunji Yearwood. Trinidadian soca artist.)
- Olatunji, Babatunde
- Olcay, Zuhal
- Old (grindcore / industrial metal band, aka O.L.D.)
- Old
- Old & In the Gray
- Old & In the Way
- Old 7 Years
- Old 97’s
- Old 97’s & Jennings, Waylon
- Old Bear Mountain
- Old Blind Dogs
- Old Canes
- Old Ceremony, The
- Old Coke
- Old Corpse Road (UK / Symphonic Black Metal with Folk influences)
- Old Crow Medicine Show
- Old Crow Medicine Show feat. Staples, Mavis
- Old Daisy
- Old Dead Tree, The
- Old Dogs
- Old Dominion (Hungarian black metal band)
- Old Dominion (US country band)
- Old Fire
- Old Firm Casuals, The
- Old Funeral
- Old Gods of Asgard
- Old Gray
- Old Loaves (New Zealand post rock/metal)
- Old Man Canyon
- Old Man Gloom
- Old Man Lizard
- Old Man Luedecke
- Old Man Markley
- Old Man River
- Old Man Saxon
- Old Man Wizard
- Old Man’s Child
- Old McBezen & Dungaree Dan
- Old Merry Tale Jazzband
- Old Mervs
- Old One
- Old Romantic Killer Band, The (NEW EP and gigs - see press release)
- Old Salt Union
- Old School Freight Train
- Old Sea Brigade
- Old Sepultura
