- Kagel, Mauricio
- Kambeitz, Niklas
- Kang, Eyvind
- Kangoro, V Kineya
- Károlyi, Pál
- Katcho, Line
- Kawamura, Koyo
- Kazandjiev, Vassil
- Kelemen, Milko
- Kelley, Russell
- Kelterborn, Rudolf
- Kennedy, Kathy
- Keren, Jonathan
- Khachaturian, Aram
- Kim, Sean
- Klanac, Petar-Kresimir
- Klatzow, Peter
- Klein, Julian
- Klughardt, August
- Knudson, Elizabeth Joanna
- Koch, Henry
- Koene, J Peter
- Koering, René
- Kohn, Amy
- Komorous, Rudolf
- Kondo, Jo
- Koprowski, Peter Paul
- Korde, Shirish
- Koshkin, Nikita
- Kotoński, Włodzimierz
- Kourliandski, Dmitri
- Kourliandsky, Dimitri
- Kramer, Eliazer
- Krauze, Zygmunt
- Krenek, Ernst
- Kröll, Georg
- Kucharzyk, Henry
- Kunst, Jos
- Kuo, William
- Kurtág, György
- Kurtz, Eugène
- Kutavicius, Bronius