- Group for Contemporary Music3
- Guaita, Giovanni, 1915-1
- Guigui, Efraín2
- Gutchë, Gene, 1907-20001
- Halem, Victor von1
- Hamburgische Staatsoper1
- Hamilton, Iain, 1922-20001
- Handel, George Frideric, 1685-17591
- Harrison, Lou, 1917-20031
- Heiss, John1
- Heldrich, Claire1
- Helps, Robert2
- Hillebrecht, Hildegard, 1927-1
- Hindemith, Paul, 1895-19631
- Hoagland, Diana1
- Hodeir, André, 1921-20113
- Hoiby, Lee1
- Hollander, John10
- Holm, Hanya, 1893-19921
- Hopkins, Gerard Manley, 1844-18893
- Hovhaness, Alan, 1911-20001
- Huggler, John1
- Humble, Keith1
- Humphrey, Doris, 1895-19583
- Husa, Karel, 1921-20161
- Huxley, Aldous, 1894-19631
- Ichiyanagi, Toshi, 1933-20221
- Ifukube, Akira, 1914-20061
- Imbrie, Andrew, 1921-20071
- Inter Nationes. issuing body1
- Ives, Charles, 1874-19541
- Jolivet, André, 1905-19741
- Joyce, James, 1882-19411
- Juilliard String Quartet1
- Kansas City Philharmonic Orchestra1
- Karimi, Mahmoud, 1927-1
- Karis, Aleck1
- Kellogg, Peter Paul, 1899-19752
- Kennedy, X. J2
- Kilpatrick, Jack Frederick1
- Kipling, Rudyard, 1865-19362
- Klein, Jason (Conductor)1
- Kleinsasser, William, 1961-1
- Knepper, Jimmy, 1927-20033
- Kohs, Ellis B., 1916-20001
- Koto nski, W odzimierz1
- Kotoński, Włodzimierz1
- Kraber, Karl1
- Kraft, Robert, 1869-19161
- Kreiger, Arthur, 1945-30
- Krenek, Ernst, 1900-19911
- Kreutz, Arthur, 1906-19911
- Krosnick, Joel2
- Kugler, Richard1
- Kurka, Robert, 1921-19572
- Kuznetsov, Anatoli, 1929-19791
- Ḳol Yiśraʼel. Orchestra1
- LaPorta, John3
- Labroca, Mario, 1896-19731
- Lavanne, Antonia1