- Kabalevsky, Dmitri
- Kaddish
- Kagel, Mauricio
- Kalevala
- Kalomiris, Manolis
- Kamānja
- Kamarinskaya
- Kammer
- Kammersymphonie
- Kander, John
- Kantele
- Karajan, Herbert von
- Karatāli
- Kashchei, The Immortal
- Káta Kabanová
- Katabasis
- Kavafian, Ani
- Kavafian, Ida
- Kay, Ulysses Simpson
- Kayagum
- Kaye, Sammy
- Kazoo
- Kempff, Wilhelm
- Kennedy, Nigel
- Keppard, Freddie
- Kern, Jerome
- Key
- Key Action
- Key Harp
- Key Signature
