Authors born in 1939
- Ian Mckellen Actor, 1939
- Ion Tiriac Businessman, 1939
- Israel Horovitz Playwright, 1939
- Jack Harbaugh Coach, 1939
- Jack Herer Writer, 1939
- Jack O'Brien Director, 1939
- Jackie Stewart Formula One Driver, 1939
- James Fox Actor, 1939
- James Galway Musician, 1939
- James Timothy Shaw Songwriter, 1939
- Jane Alexander Author, 1939
- Jane Bryant Quinn Journalist, 1939
- Jane Yolen Writer, 1939
- Janet Suzman Actress, 1939
- Jean-Marie Lehn Chemist, 1939
- Jeff Smith Cookery Writer, 1939
- Jim Bouton Baseball Player, 1939
- Joe Clark Statesman, 1939
- Joe Pitts Politician, 1939
- Joel Schumacher Film Director, 1939
- John Amos Actor, 1939
- John Badham Film Director, 1939
- John Casey Academic, 1939
- John Chilcot Civil Servant, 1939
- John Cleese Actor, 1939
- John Fahey Guitarist, 1939
- John Frame Philosopher, 1939
- John Howard Politician, 1939
- John Negroponte Diplomat, 1939
- John Peel Disc Jockey, 1939
- John Pilger Journalist, 1939
- John Sculley Businessman, 1939
- John W. Snow Chief Executive Officer, 1939
- John Walters Musician, 1939
- Jorge Paulo Lemann Entrepreneur, 1939
- Josh McDowell Evangelist, 1939
- Judy Carne Actress, 1939
- Judy Chicago Artist, 1939
- Judy Collins Singer-Songwriter, 1939
- Kallam Anji Reddy Businessman, 1939