- Bach, Carl Philipp Emanuel
- Bach, Johann Sebastian
- Bachelet, Alfred
- Bachlund, Gary
- Backer-Grøndahl, Agathe Ursula
- Bacon, Ernst
- Bairstow, Edward Cuthbert
- Baksa, Robert F.
- Balfe, Michael William
- Ballif, Claude
- Baltar, Francisco
- Bantock, Granville Ransome
- Barab, Seymour
- Barber, Samuel
- Barbieri, Francisco Asenjo
- Bartók, Béla
- Bartolí-Soler, Salvador
- Basili, Basilio
- Bassani, Giovanni Battista
- Baumgartner, Wilhelm
- Bautista, Julián
- Bax, Arnold Edward Trevor
- Baxter, Garth
- Beach, Amy Marcy
- Beck, John Ness
- Becker, Reinhold
- Beeson, Jack Hamilton
- Beethoven, Ludwig van
- Behrend, Arthur Henry
- Bellini, Vincenzo
- Bemberg, Herman
- Bembo, Antonia
- Benaigues y Pujol, Josep Maria
- Bencini, Pietro Paolo
- Benda, Georg
- Benedict, Julius
- Berg, Alban
- Berg, Natanael
- Berger, Hugo
- Berger, Ludwig
- Berio, Luciano
- Berkeley, Lennox
- Berlioz, Hector
- Bernstein, Leonard
- Beydts, Louis
- Bezanson, Phillip Thomas
- Bezold, Gustav von
- Bishop, Henry Rowley
- Bizet, Georges
- Blank, Allan
- Blanquer Ponsada, Amando
- Blasco Compans, Justo
- Blech, Leo
- Bliss, Arthur
- Blitzstein, Marc
- Blomberg, Adolf
- Blon, Franz von
- Blow, John
- Bohm, Carl
- Boito, Arrigo
- Bókay, János
- Bolcom, William
- Bonetti, Vinzenzo
- Bononcini, Antonio Maria
- Bononcini, Giovanni Battista
- Bononcini, Giovanni Maria
- Borch, Gaston
- Bordes, Charles
- Borja y Tapia, Francisco de
- Botsford, George
- Böttcher, G.
- Boulanger, Lili
- Boulanger, Nadia
- Boyce, William
- Brahe, May
- Brahms, Johannes
- Bretón, Tomás
- Bréville, Pierre de
- Bridge, Frank
- Brillon de Jouy, Anne Louise
- Britten, Benjamin
- Bronsart von Schellendorf, Ingeborg
- Bruch, Max
- Bruckner, Anton
- Brüll, Ignaz
- Bruneau, Alfred
- Bruni, Domenico
- Buck, Dudley
- Buczynski, Walter Joseph
- Bunge, Sas
- Bungert, August
- Burgmüller, Norbert
- Burkhard, Willy
- Burleigh, Harry Thacker
- Bush, Geoffrey
- Busoni, Ferruccio
- Büsser, Henri
- Bustos, Mariano
- Butterworth, George
- Buttykay, Ákos