Authors born in 1968
- Joan Larsen Judge, 1968
- Joe Bastianich Restaurateur, 1968
- Joe Cornish Comedian, 1968
- Joey Lauren Adams Actress, 1968
- John Connolly Writer, 1968
- John Dickerson Journalist, 1968
- John DiMaggio Voice Actor, 1968
- John Grant Singer-Songwriter, 1968
- John Niven Author, 1968
- John O'Neill Athlete, 1968
- John Singleton Film Director, 1968
- Johnny Kelly Drummer, 1968
- Jon Glaser Actor, 1968
- Jonathan Brown Rower, 1968
- Jonathan Eisen Biologist, 1968
- Jonathan Evison Writer, 1968
- Jonathan Knight Singer, 1968
- Jordi Molla Actor, 1968
- Jorgen Vig Knudstorp Chief Executive Officer, 1968
- Jorja Fox Actress, 1968
- Jose Ferreira Entrepreneur, 1968
- Josh Brolin Actor, 1968
- Judith Hoag Actress, 1968
- Jules Asner Television Personality, 1968
- Kang Chol-hwan Writer, 1968
- Karen Lord Writer, 1968
- Karl Ove Knausgaard Author, 1968
- Karl Ove Knausgard Author, 1968
- Karyn Kusama Film Director, 1968
- Kate Obenshain Journalist, 1968
- Kate Reardon Author, 1968
- Katherine Albrecht Advocate, 1968
- Kathleen Hanna Musician, 1968
- Katie Roiphe Author, 1968
- Katrina Adams Tennis Player, 1968
- Keith Anderson Music Artist, 1968
- Kelley Armstrong Writer, 1968
- Kelly Ayotte Lawyer, 1968
- Kelly Hu Actress, 1968
- Kelly Rutherford Actress, 1968