Authors born in 1966
- Jason Patric Actor, 1966
- Jason Scott Lee Actor, 1966
- Jay London Comedian, 1966
- Jeff Buckley Singer-Songwriter, 1966
- Jeff Duncan Politician, 1966
- Jeff Fitzgerald Politician, 1966
- Jeff Healey Singer-Songwriter, 1966
- Jeff Waters Guitarist, 1966
- Jeffrey Dean Morgan Actor, 1966
- Jennifer Grant Actress, 1966
- Jennifer Palmieri Statesman, 1966
- Jeremy Hunt Politician, 1966
- Jeroen Dijsselbloem Politician, 1966
- Jerry Cantrell Musician, 1966
- Jerry Fulton Cantrell Jr. Musician, 1966
- Jill Davis Author, 1966
- Jill Lepore Historian, 1966
- Jim Gaffigan Comedian, 1966
- Jim Himes Businessman, 1966
- Jimmy Wales Entrepreneur, 1966
- Jodi Picoult Writer, 1966
- Johan Lundgren Chief Executive Officer, 1966
- John Cusack Actor, 1966
- John Maeda Business Executive, 1966
- Johnny Colt Bassist, 1966
- Joichi Ito Activist, 1966
- Jon Favreau Actor, 1966
- Jonathan Silverman Actor, 1966
- Joshua Malina Actor, 1966
- Julia Davis Comedian, 1966
- Kamal Ahmed Comedian, 1966
- Kara Ross Jewellery Designer, 1966
- Karyn Parsons Television Actor, 1966
- Kate Constable Author, 1966
- Kate Forsyth Journalist, 1966
- Katharine Weymouth Lawyer, 1966
- Katherine LaNasa Actress, 1966
- Keith Ferrazzi Author, 1966
- Ken Levine Designer, 1966
- Ken Mehlman Politician, 1966