Authors born in 1984
- A Fine Frenzy Singer, 1984
- Aaron James "A. J." Hawk Football Player, 1984
- AB de Villiers Cricketer, 1984
- Abbi Jacobson Actress, 1984
- Adam Anderson Musician, 1984
- Adam D'Angelo Businessperson, 1984
- Adam DeVine Comedian, 1984
- Adam Lamberg Television Actor, 1984
- Ahmad Balshe Rapper, 1984
- Ahna O'Reilly Actress, 1984
- Alan Ritchson Actor, 1984
- Alastair Cook Cricketer, 1984
- Alex Bruce Football Player, 1984
- Alex Parks Singer, 1984
- Alex Smith American Football Player, 1984
- Alexa Von Tobel Businessman, 1984
- Alexandra Kosteniuk Chess Player, 1984
- Alexis Davis Wrestler, 1984
- Alexis Dziena Actress, 1984
- Ali Krieger Football Player, 1984
- Allan Ray Basketball Player, 1984
- Amanda Fuller Actress, 1984
- Amanda Hearst Socialite, 1984
- Amanda Hocking Writer, 1984
- Amelia Atwater-Rhodes Author, 1984
- America Ferrera Actress, 1984
- Amruta Khanvilkar Actress, 1984
- Amy Hastings Athlete, 1984
- Andra Day Singer-Songwriter, 1984
- Andre Iguodala Basketball Player, 1984
- Andre Ward Boxer, 1984
- Andrea Libman Actress, 1984
- Andres Iniesta Football Player, 1984
- Andrew Bogut Basketball Player, 1984
- Andrew Chan Activist, 1984
- Andy Wilkinson Football Player, 1984
- Anna Nalick Composer, 1984
- Annabelle Wallis Actress, 1984
- Anneliese Louise van der Pol Actress, 1984
- Anthony Dirrell Boxer, 1984