Dottie O'Brien	Hod O'Brien	Helen O'Connell	Mark O'Connor
Stan O'Daffer	Anita O'Day	Kevin O'Donnell	O'DonnellGroup
Arturo O'Farrill	Chico O'Farrill	Betty O'Hara	Tony O'Malley
Johnny O'Neal	Fintan O'Neill	O-Zone Percussion Group	ONOFFON
INSIDE OUT	Paul Oakenfold	Scott Oakley	Bernard Oattes
Dick Oatts	Ray Obiedo	Obo and Sol Luna	Piero Odorici Quintet
Odyssey Band	Cullen Offer	Og O Go	Claus Ogerman
Andrew Oh	Okeh Rhythm and Blues	Old and In The Way	Old And New Dreams
Olin Maggi Quartet	Oliver Lake Steel Quartet	Sy Oliver	Richard Olsen
Lesley Olsher	Olympia Brass Band	Onderdonk / Walker	One Eighty
One Forty Four Twenty	One Step Beyond	One for All	Onus Ensemble
Gerard Gustin Onzet	Open Door	Open Loose	Ophelia Ragtime Orchestra
Opus De Jazz	Orange Then Blue	Oranj Symphonette	Jerry Orbach
Masaoka Orchestra	The Chris McDonald Orchestra	Oregon	Oriental Illusions
Origem	Original Dixieland Jazz Band	Original Salty Dog Jazz Band	Original Salty Dogs Jazz Band
Robert Philip Orlando	New Orleans Owls	Walton Ornato	Tomas Ornberg
Tomas Blue Five Ornberg	Orpahn Newsboys	Orphan Newsboys	Orquesta Nova
Orquesta Tipica Select	Orquestra Hasta Domi	Orquestra Nova	Niels Henning Orsted Pedersen
Kid Ory and Red Allen	Osaka and Hara Quintet	David Osborne	Will Osborne
Greg Osby	Oscar Moore Quartet	Lee Oskar	Bob Ostertag
Eric Ostling	Lisa Otey	Other Dimensions In Music	Other Quartet
Kym Outerbridge	Outside	Outsidemen	Oversize Quartet
Oversoul	Tony Oxley Celebration Orchest	Keith Oxman	Oyate
Makota Ozone	Makoto Ozone