- O
- OO
- OO
- OO
- OOak
- OakOb
- ObObl
- OblOC
- OCOce
- OCEOct
- OctOcu
- OcuOdd
- OddOdi
- OdiODZ
- OeOff
- OffOff
- Offogo
- ogoOh
- OhOHN
- OhnOje
- OjeOKA
- OKAOku
- OkuOla
- OlaOld
- OldOle
- OleOli
- OliOli
- OliOls
- Ols
- OmaOme
- OmeOmn
- OmnOna
- OnaOne
- OneONE
- Oneone
- OneONI
- OniOnl
- OnlOny
- OnyOos
- OosOpe
- OpeOpp
- OprORA
- OraOrb
- OrbOrc
- OrcOrd
- OrdOrg
- OrgOri
- OriOri
- OriOrm
- OrmOrq
- OrqOrs
- OrsOru
- Osb
- OsbOse
- OseOsm
- OsmOst
- OstOth
- OthOtt
- OttOty
- OtyOur
- OurOut
- OutOut
- OutOut
- OutOve
- OveOvi
- OviOwe
- OweOxa
- OxbOZ
- Oz
- ozz
- One Chance
- One Chance feat. Fabo
- One Click Straight (Alternative Filipino Band)
- One Cool Guy
- One Dae
- One Day (Australian hip-hop)
- One Day Alive (Heavy Metal Band)
- One Day as a Lion
- One Day Hero
- One Day Remains (Based in Switzerland)
- One Dead Three Wounded
- One Desire (Melodic rock band from Finland)
- One Dimensional Creatures (Manchester, UK - alt punk/post-punk/grunge)
- One Dimensional Man
- One Direction (English‐Irish pop boy band)
- One Dollar Short
- One Dove
- ONE DRAFT
- One Drop (reggae group)
- One dying wish (Italian band)
- One eskimO
- One Eye Closed
- One Eyed Moon (garage/punk/stoner rock band from Atlanta, Georgia)
- One Fall
- One Fine Day (German rock/punk band)
- One Flew South
- One Flew West
- One for All (Jazz Group)
- One for the Team
- One for the Team (Indie Rock band from Minneapolis MN)
- One Hacker Band
- One Hello World
- One Hit Wonder (California punk band)
- One Hope
- One Horse Band
- One Hundred Hours
- One Hundred Steps (Portugese post-hardcore band)
- One Hundred Thorns
- One Hundred Thousand
- One Hundred Year Ocean
- One Hundred, The
- One I Cinema
- One in a Googolplex
- One in a Million (1960s Scottish psychedelic band)
- One in a Million (Dutch rock/ska band)
- One In The Chamber (Rock Band)
- One Inch Giant
- One King Down
- One Last Glance
- One Last Wish
- One Leg Mary (Greek Alternative/Post-Hardcore Band)
- One Less Reason
- One Life Crew
- One Light Out
- One Little Plane
- One Love Family
- One Machine
- One Man
- One Man and His Droid
- One Man Army (USA punk band)
- One Man Army and the Undead Quartet
- One Man Boycott (One Man Boycott (Band))
- One Man's Trash (AOR project)
- One Million Bulgarians
- One Million Dollars
- One Minute Silence
- One more chance
- One More Girl
- One More Time
- One Morning Left
- ONE N' ONLY
- One Nation Crew (gospel vocal)
- One Nation Under (American metalcore band)
- One Night Band, The (Montreal ska band)
- One Night Only
- One Night Rodeo
- One O’Clock Lab Band
- One of a Kind (rock band)
- One of Hours
- One of the Last
- One of Us
- ONE OK ROCK
- ONE OK ROCK feat. 5 Seconds of Summer
- ONE OK ROCK feat. Carter, Tyler
- ONE OK ROCK feat. Gaskarth, Alex
- ONE OK ROCK feat. Lavigne, Avril
- ONE OK ROCK feat. Swims, Teddy
- ONE OK ROCK featuring Quinn, Kellin from Sleeping with Sirens
- ONE OR EIGHT
- ONE PACT
