Authors born in 1983
- Joe Thomas Actor, 1983
- John Magaro Actor, 1983
- Johnny Flynn Singer-Songwriter, 1983
- Jolene Purdy Actress, 1983
- Jon Johansen Programmer, 1983
- Jona Weinhofen Guitarist, 1983
- Jonah Hill Actor, 1983
- Jonathan Steingard Musician, 1983
- Jose Reyes Baseball Player, 1983
- Joseph Altuzarra Fashion Designer, 1983
- Joseph Mazzello Actor, 1983
- Josh Wilson Musician, 1983
- Joshua Roman Cellist, 1983
- JP Cooper Singer-Songwriter, 1983
- JR artist Photographer, 1983
- Jun Matsumoto Singer, 1983
- Kamerion Wimbley American Football Player, 1983
- Karan Patel Actor, 1983
- Karine Vanasse Actress, 1983
- Kat Edmonson Songwriter, 1983
- Kate Beaton Comics Artist, 1983
- Kate Bosworth Actress, 1983
- Kate Mara Actress, 1983
- Katherine Ryan Comedian, 1983
- Katia Winter Actress, 1983
- Katie McGrath Actress, 1983
- Katie Piper Philanthropist, 1983
- Katie White Musician, 1983
- Katrina Kaif Actress, 1983
- Katrina Lake Businesswoman, 1983
- Katy Tur Author, 1983
- Kazunari Ninomiya Singer, 1983
- Kelela Mizanekristos Singer, 1983
- Ken Wallace Athlete, 1983
- Kerry Condon Actress, 1983
- Kevin Systrom Entrepreneur, 1983
- Kiersten White Author, 1983
- Kim Clijsters Tennis Player, 1983
- Kim Jong-un Politician, 1983
- Kim Smith Actress, 1983