- Heinrich, Anthony Philip, 1781-18613
- Heldrich, Claire1
- Hendl, Walter, 1917-20077
- Henry, Sheldon1
- Herbert, Victor, 1859-19241
- Hertig, Renee1
- Hindemith, Paul, 1895-19633
- Hineline, Alan1
- Hodeir, André, 1921-20113
- Hofmann, Leopold, 1738-17931
- Hoiby, Lee1
- Holder, Christian1
- Holtz, Deborah (Violist)1
- Hong, Weilie1
- Hopkins, Donald, 1931-1
- Hosticka, Frank1
- Hovhaness, Alan, 1911-20001
- Huggler, John2
- Humble, Keith1
- Humphrey, Doris, 1895-19581
- Husa, Karel, 1921-20161
- Ichiyanagi, Toshi, 1933-20221
- Illosovay, Elsor von, 1937-1
- Ingraham, Paul1
- International Institute of Rural Reconstruction6
- Ippolito, Carmela3
- Israel, Theodore, 1927-19871
- Isuzu Jidōsha Kabushiki Kaisha21
- Ives, Charles, 1874-19542
- JR Gurūpu21
- Jacobi, Frederick, 1891-19521
- Jacobs, Paul, 1930-19831
- Japan Ekisupo Toyama'9246
- Jekowsky, Barry1
- Jeong, Yoon-joo3
- Johnson, Thomas (Composer)1
- Johnson, Thor1
- Jolivet, André, 1905-19741
- Jonassaint, Carld Jorel1
- Jones, Harold, 1934-20151
- Jordan, Irene, 1919-20161
- Jorn, Asger, 1914-19734
- Joyce Trisler Danscompany1
- Juilliard String Quartet1
- Kalisch, Joan1
- Kalish, Gilbert2
- Kansas City Philharmonic Orchestra1
- Kaplan, Lewis5
- Karman, Lotte2
- Katz, Mary1
- Kaye, Milton2
- Kellogg, Peter Paul, 1899-19752
- Kessner, Daniel, 1946-1
- Kessner, Dolly, 1946-1
- Kibler, Belva, 1913-19831
- Killar, Ashley, 1944-1
- Killmer, Richard1
- Kim, Sung-tae1
- Kirchner, Leon1
- Kirkbride, Jerry2