| Author (number of quotes) | Description |
| Ja |
| J. Gaines, Ernest (1) | African-American author |
| Jackman, Hugh (2) | Australian producer and actor |
| Jackson, Jesse Louis (1) | American activist |
| Jackson, Michael (9) | American musician |
| Jackson, Samuel L. (1) | American actor |
| James, E. L. (1) | pen name of Erika Mitchell, English author |
| James, Henry (2) | American-born English author |
| James, William (6) | American psychologist and philosopher |
| Jauregui, Lauren (1) | American singer |
| Jay, Francine (5) | American writer, minimalist |
| Je |
| Jeffers, Robinson (1) | |
| Jeffers, Susan (1) | American psychologist |
| Jefferson, Thomas (9) | American president, lawyer, inventor |
| Jelinek, George (1) | Australian doctor |
| Jenkins, A. M. (5) | American author |
| Jenner, Kylie (1) | American TV personality, model and entrepreneur |
| Jerome, Jerome K. (1) | English writer and humorist |
| Jett, Joan (1) | American rock singer, songwriter, composer and actress |
| Ji |
| Jillette, Penn (29) | American illusionist and comedian |
| Jo |
| Jo Kwon (1) | South Korean singer |
| Jobs, Steve (6) | American businessman and inventor |
| John, Elton (1) | English composer, musician and singer |
| Johnson, Barbara (2) | English-American author |
| Johnson, Dwayne (1) | American actor, producer, and wrestler |
| Johnson, Kimberly (1) | American poet and scientist |
| Johnson, Samuel (10) | English author and poet |
| Johnson, Wendell (1) | American psychologist |
| Johnston, Lynn (1) | Canadian cartoonist |
| Jókai, Mór (4) | Hungarian author |
| Jolie, Angelina (1) | American actress and model |
| Jones, Franklin Pierce (2) | American author, comedian |
| Jones, James Earl (1) | American actor |
| Jones, Laurie Beth (1) | American author and motivational trainer |
| Jones, Lloyd (1) | New Zealand author |
| Jones, Tommy Lee (1) | American actor, director, producer and screenwriter |
| Jong, Erica (3) | American author and teacher |
| Joplin, Janis Lyn (4) | American singer |
| Jordan, David Starr (1) | American biologist and educator |
| Joubert, Joseph (5) | French moralist and essayist |
| Jowett, Benjamin (1) | English theologian |
| Joyce, James (2) | Irish-born poet, author, criticist |
| József, Attila (10) | Hungarian poet |
| Ju |
| July, Miranda (2) | |
| Jung, Carl Gustav (4) | Swiss psychiatrist, psychologist |