- Haas, Georg Friedrich
- Haché, Jean-François
- Haefliger, Andreas
- Haglund, Rolf
- Hahn, Hilary
- Hahn, Reynaldo
- Haimovitz, Matt
- Håkon Ånesen, Arnt
- Hale, James
- Halévy, Ludovic
- Hall, Emily
- Halladay, Wallace
- Hallett, Phil
- Halmarson, Sarah
- Hambraeus, Bengt
- Hamdani, Dorsaf
- Hamel, André
- Hamel, Claude
- Hamel, Félix-Antoine
- Hamel, Keith
- Hamel-Beauchamp, Anne-Claude
- Hamelin, Marc-André
- Hamilton, Andy
- Hamilton, Robert
- Hammarström, Sara
- Hamon, Pierre
- Han, Xue
- Hand, Mark
- Handel, George Frideric
- Hanlon, Kevin
- Hannigan, Barbara
- Harchanko, Joseph
- Harding, Charles
- Harel, Gilad
- Harel, Mélanie
- Harel, Simon
- Harley, James
- Harman, Chris Paul
- Harmens, Hugo
- Harmonie FAMEQ
- Harms, Ted
- Harnois, Daniel
- Harris, Donald
- Harrison, Jonty
- Harrold, Steven
- Hartleben, Otto Erich
- Harton, Sara
- Hartwell, Hugh
- Harvey, Jonathan
- Hashimoto, Kyoko
- Hashimoto, Sae
- Hatzis, Christos
- Haubenstock-Ramati, Roman
- Haugen, Bjørn Erik
- Haupt, Alexander
- Hauser, Alexis
- Hawkins, John
- Haydn, Joseph
- Haydn, Michael
- Hayes, David
- Hayeur, Caroline
- Hayley, Dorothea
- Heard, Alan
- Heaton, Roger
- Hébert, Anne
- Hébert-Tremblay, Suzanne
- Hedelin, Fredrik
- Heider, Werner
- Heimbecker, Steve
- Heineman, Steve
- Heiniger, Wolfgang
- Heizmann, Jürgen
- Helble, Raimond
- Helffer, Claude
- Hellawell, Piers
- Heller, Rebekah
- Helmer, Paul
- Henderickx, Wim
- Hendrix, Jimi
- Henri-Garand, Laure
- Henry, Mathilde
- Henry, Pierre
- Henry, Symon
- Henze, Hans Werner
- Héon-Morissette, Barah
- Herbeck, Ernst
- Hereish, Julie
- Hersant, Philippe
- Hervieux, Marc
- Hesby, Marius
- Hespos, Hans-Joachim
- Hess, John
- Hetherington, David
- Hétu, Jacques
- Hétu, Joane
- Heusinger, Detlef
- Heward, John
- Heward Quintet, John
- Hewett, Ivan
- Hiatus
- Hicks, Darren
- Higham, Edana
- Hilde Neset, Anne
- Hill, Eric
- Hill, Peter
- Hillborg, Anders
- Hillesum, Etty
- Hilliard Ensemble
- Hillis, Amy
- Hindemith, Paul
- Hindman, Heather
- Hinton, Newt
- Hippe, Stefan
- Hiratsuka, Natsuki
- Hirayama, Haruka
- Hirshfield, Jane
- Hmmh
- Ho, Alice Ping Yee
- Ho, Vincent
- Hobkirk, Neil
- Hochstetter, Gustav
- Hode-Keyser, Philippe
- Hodkinson, Sydney
- Hoerning, Christine
- Hoff, Kristin
- Hoffman, Elizabeth
- Hofstetter, Beat
- Hogan, Michael D
- Hoi Kiu Choi, Kelsey
- Holbrook, Geof
- Holdaway, Wendy
- Holden, Anthony
- Hölderlin, Friedrich
- Höller, York
- Holliger, Heinz
- Hollmann, Horst
- Hollmer, Lars
- Holterbach, Manu
- Honegger, Arthur
- Hong, Mili
- Hood, Joanna
- Hood, Susanna
- Hope, Cat
- Hopper, Ralph
- Horn, Carolyn
- Hornsey, Philip
- Horsley, Joshua
- Horton, Gred
- Horvey, Amy
- Hossfeld, Christopher
- Höstman, Anna
- Houde, François
- Hough, Stephen
- Houle, François
- Houle, Jonathan
- Houle, Julie
- Houle, Marc-André
- Houle, Nicolas
- House of Gold
- Howes, Heather
- Hratchian, Hraïr
- Hron, Terri
- Hsiao, Chung-Han
- Hsieh, Dailin
- Huang, Aiyun
- Huang, Nikki
- Huard, Bruce
- Huber, Klaus
- Huber, Nicolaus A
- Hubert, Marko
- Hudon, Marcelle
- Hudon, Sabin
- Hudry, David
- Huet, Noëlla
- Huhtanen, Carla
- Hui, Melissa
- Hum, Peter
- Hunt, Richard
- Huot, Denis
- Hureau-Parreira, Arthur Pierre Antoine
- Hurel, Philippe
- Hürn, Tsulkie
- Husaruk, Eugène
- Huss, Christophe
- Huston, Elizabeth
- Hwang, David Henry
- Hyland, Marc
