Quotation authors by 'I'
| Full name | Nationality | Profession |
|---|---|---|
| Ernie Isley | American | Musician |
| Eugene Ionesco | French | Dramatist |
| Frank Iero | American | Musician |
| Gabriel Iglesias | American | Comedian |
| Gabriela Isler | Venezuelan | Model |
| Garik Israelian | Armenian | Scientist |
| Goran Ivanisevic | Croatian | Athlete |
| Greg Iles | American | Novelist |
| Guillermo Cabrera Infante | Cuban | Novelist |
| Gwen Ifill | American | Journalist |
| Hale Irwin | American | Athlete |
| Helge Ingstad | Norwegian | Explorer |
| Henrik Ibsen | Norwegian | Poet |
| Henry Irving | English | Actor |
| Ignatius of Antioch | Roman | Clergyman |
| Igor Ivanov | Russian | Statesman |
| Immaculee Ilibagiza | Rwandan | Author |
| Isaac of Nineveh | Greek | Saint |
| Isco | Spanish | Athlete |
| Jack Irons | American | Musician |