The Obsessed

The Occasion

The Occasional Keepers

The Ocean

German metal band

The Ocean Blue

American indie pop

The Ocean Party

Theocracy

The O.C. Supertones

The Octopus Project

The Odd Couple

US? hip hop

The Odious

The Odorants

Theodore Bikel

Theo Eastwind

The Offenders

Willie Nelson's Pre-Family Band

The Offering

Christian folk

The Offseason

The Offspring

American punk

The Oh Hellos

The Ohio State University Wind Symphony

The O’Jays

The O’Kanes

The O’Kaysions

The Old Ceremony

The Old Dead Tree

The Old Firm Casuals

The Olivia Project

The Olivia Tremor Control

The Olms

The Olympics

US doo wop group

The Omega Experiment

The One AM Radio

The Ongoing Concept

Theo Nijland

The Only Ones

The Oohlas

The Open

Theophilus London

The Opposites

The Oppressed

Welsh punk/oi

The Orange Lights

The Orange Man Theory

The Orange Peels

The Oranges Band

The Orange Strips

indie, croatian, rock, alternative, indie-rock

The Orb

The Orchestra

remnants of ELO and ELO Part II

The Orchids

Sarah Records

The Order of Israfel

The Order of the Fly

The Order of the Sanguine Diadem

The Ordher

The Ordinary Boys

Theoretical Girl

The Organ

The Organization

90s US funk metal band

The Original Caste

folk group

The Original Gospel Harmonettes

The Originals

Motown group

The Original Wildcat Jass Band

The Orion Experience

Theorius Campus

pop duo of Antonello Venditti & Francesco De Gregori

The Orlons

The Ornette Coleman Quartet

The Orphan Newsboys

The Orwells

Theory in Practice

Theory of a Deadman

The Osborne Brothers

The Oscar Peterson Quartet

The Oscar Peterson Trio

The Oscillation

The Osmonds

Theo Tams

The Other

Horrorpunk band from Germany

The Other Ones

Australian-German band, hit single "Holiday"

The Others

2000s UK rock band

The Other Side of the Sky

The Other Two

Theo Travis

British saxophonist, flautist and clarinetist

The Outcasts

Northern Ireland punk band

The Outfield

The Outhere Brothers

The Out-Islanders

The Outlaws

60s English instrumental band

The Outline

Los Angeles experimental rock band

The Outnumbered

The Outpatience

The Outsiders

60's Dutch psychedelic band

The Outsiders

60's USA pop/rock band

Theo Vaness

The Overseer

The Oversoul 13

The Overtones

UK founded (from X Factor) vocal harmony group

The Overtones

US Overtones Gospel Quartet

TheOvertunes

The Owens

The Owl Service

The Ozark Mountain Daredevils

The Pacers

60s US rockabilly band

The Pacific Ocean

The Pack

hip hop

The Pack A.D.

The Paddingtons

The Pains of Being Pure at Heart

The Paladins

The Pale

Band from Bellingham, WA

The Pale Fountains

The Pale Pacific

The Palmer Squares

The Panacea

drum 'n bass artist Mathis Mootz

The Panas Dalam

The Panda Band

The Pandoras

All-female garage rock band from Los Angeles, California

The Panic Channel

The Panic Division

The Panics

Australian band

The Paperboys

Canadian folk music band

The Paper Chase

The Paper Kites

The Paper Melody

The Paper Raincoat

The Parachute Club

The Paradise Band

The Paradise Motel

The Paragons

Jamaican rocksteady band

The Paragons

New York doo-wop group

The Paramedic

The Paramounts

The Paranoid

The Parkinsons

The Parley of Instruments

The Parlor Mob

The Parlotones

The Parselmouths

The Parson Red Heads

The Partisans

UK punk band

The Partisan Turbine

The Partland Brothers

The Partridge Family

The Party

The Partysquad

The Pasadenas

The Pastels

Scottish pop group

The Path of Resistance

US hardcore punk band

The Pattern

Indie rock

The Paul Butterfield Blues Band

The Paul Schwartz Project

The Pavers

The Pax Cecilia