| Author (number of quotes) | Description |
| Ha |
| Haddon, Mark (1) | English novelist and poet |
| Haisch, Bernard (1) | German-born American astrophysicist |
| Hale, Edward Everett (1) | |
| Hale, Shannon (2) | |
| Hall, Joseph (1) | |
| Halmos, Paul (2) | Hungarian-born American mathematician |
| Halsey, Margaret (1) | American author |
| Hamilton, Laurell K. (17) | |
| Hamilton, Lewis (2) | English driver |
| Hammarskjöld, Dag (3) | Swedish politician |
| Han, Jenny (1) | |
| Handey, Jack (1) | American humorist |
| Hannah, Kristin (2) | American author |
| Hannigan, Alyson (1) | American actress |
| Hansberry, Lorraine (1) | American author |
| Hanson, Joe (1) | American writer and comedian |
| Hardy, Tom (1) | English actor |
| Harris, Annaka (3) | american author |
| Harris, Calvin (1) | Scottish DJ, record producer, singer, and songwriter |
| Harris, Charlaine (23) | American author |
| Harris, Ed (1) | American actor |
| Harris, Joanne (8) | English author |
| Harris, Sam (36) | American author, philosopher |
| Harris, Sydney J. (2) | |
| Harrison, George (1) | English musician, singer and songwriter, the lead guitarist of the Beatles |
| Hart, Hannah (1) | American comedian, actress and author |
| Harte, Bret (1) | American author and poet |
| Harwell, Ernie (1) | American sportscaster |
| Hathaway, Anne (1) | American actress |
| Hawking, Stephen (13) | English physicist |
| Hawkins, Karen (4) | American author |
| Hawn, Goldie (2) | American actress, director, singer, and producer |
| Hawthorne, Nathaniel (3) | American author |
| Hay, Louise L. (2) | American author |
| Hayek, Friedrich (13) | British economist and philosopher |
| Hazlitt, William (1) | |
| He |
| Heber, Reginald (1) | English bishop |
| Hedberg, Mitchell Lee (2) | American comedian |
| Heffernan, Margaret (1) | American businesswoman and writer |
| Heine, Heinrich (2) | German poet, author, journalist |
| Heinlein, Robert Anson (5) | American science fiction writer |
| Heisenberg, Werner (4) | German physicist |
| Helberg, Simon (1) | American actor and comedian |
| Heller, Erich (1) | |
| Helprin, Mark (1) | |
| Helps, Arthur (1) | |
| Hemingway, Ernest (10) | American author, journalist |
| Hendrickx, Melissa (1) | |
| Hendrix, Jimi (2) | |
| Henley, William Ernest (1) | |
| Henry, O. (1) | pen name of the American writer William Sydney Porter |
| Hepburn, Audrey (5) | English–Dutch-born American-English actress |
| Hepburn, Katharine (1) | American actress |
| Heraclitus (1) | |
| Herbert, Frank (2) | American sci-fi author |
| Herbert, George (2) | |
| Herold, Don (1) | American comedian, author, illustrator, and cartoonist |
| Herrick, Robert (1) | |
| Herriot, James (1) | |
| Hertzberg, Hendrik (1) | American journalist |
| Heschel, Abraham Joshua (1) | Polish-born American rabbi, theologian, and philosopher |
| Hess, Louise A. (1) | |
| Hesse, Hermann (4) | |
| Hetfield, James Alan (1) | |
| Hi |
| Hi, Lee (1) | South Korean singer |
| Hiddleston, Tom (4) | English actor |
| Hilbert, David (3) | German mathematician |
| Hildebrand, Joel (1) | American educator |
| Hill, Napoleon (1) | American author |
| Hillis, Danny (1) | American scientist, engineer, entrepreneur, and author |
| Hinckley, Gordon B. (1) | |
| Hippocrates (1) | ancient Greek physician |
| Hirsch, Mary (1) | |
| Hitchcock, Alfred (1) | English director, producer, screenwriter |
| Hitchens, Christopher (5) | British American author and journalist |
| Ho |
| Hobbes, John (1) | |
| Hocking, Amanda (1) | American writer |
| Hodgell, P. C. (1) | American fantasy writer, artist, professor |
| Hodgson, Ralph (1) | |
| Hoffer, Eric (1) | |
| Hoffman, Alice (1) | American author |
| Hoffman, Dustin (2) | American actor and producer |
| Hofstadter, Douglas (2) | |
| Holland, Josiah Gilbert (1) | American author and poet |
| Holliwell, Raymond (1) | American author |
| Holmes, Oliver Wendell (9) | |
| Holtz, Lou (5) | American football coach and motivational speaker |
| Hope, Bob (5) | English-born American comedian |
| Hopkins, Ellen (1) | American novelist |
| Horace (1) | |
| Horan, Niall (2) | Irish-born musician |
| Horn, Matthew (2) | |
| Hornby, Nick (4) | English author |
| Hornsby, Rogers (1) | American baseball player and coach |
| Horowitz, Anthony (1) | English author |
| Horton, Douglas (1) | |
| Hosseini, Khaled (8) | Afghan-born American author and doctor |
| Houston, Whitney (1) | American singer |
| Howe, Edgar Watson (1) | American author |
| Hu |
| Hubbard, Elbert (18) | American author and philosopher |
| Hubbard, Frank McKinney (2) | American cartoonist, journalist, comedian |
| Hubble, Edwin (1) | American astronomer |
| Hudson, Kate (1) | American actress |
| Huffman, Felicity (1) | American actress |
| Hughes, Langston (1) | |
| Hugo, Victor (17) | French poet, writer |
| Hull, Raymond (1) | Canadian screenwriter |
| Hume, David (1) | Scottish philosopher and historian |
| Hunt, Patricia (1) | |
| Hurston, Zora Neale (1) | American singer |
| Huxley, Aldous (9) | |
| Huxley, Thomas Henry (8) | |