I
- Lee Iacocca
- Dolores Ibarruri
- Henrik Ibsen
- Carl Icahn
- Eric Idle
- Lonzo Idolswine
- Black Adder II
- Daisaku Ikeda
- George Iles
- Ivan Illich
- The Rubaiyat of Samizdata Illuminatus
- Harry Imber
- John Imhoff
- Pete Incaviglia
- Hallmark, inspired by Native American Indians
- Marty Indik
- Dean William R. Inge
- William Inge
- William Ralph Inge
- Robert Green Ingersoll
- Caroline Marvin and David W. Ingle
- Miranda Ingram
- Hammond Innes
- Eugene Ionesco
- Iphicrates
- Lyndon Irving
- Washington Irving
- Andy Offutt Irwin
- Walter Isaacson
- Ischomachus
- Christopher Isherwood
- A summary of Sunni law on apostasy given by Mohammed Al Abdari Ibn Hadj in Al Madkhal quoted by S. M. Zwemer in The Law of Apostasy in Islam
- From a fine old Scottish gentleman from "The Black Isle"
- Molly Ivins
