Authors born in 1955
- Jimmy Smits Actor, 1955
- Joe Arroyo Singer-Songwriter, 1955
- Joe Donnelly Attorney At Law, 1955
- John Baldacci Politician, 1955
- John Barrow Politician, 1955
- John Burnside Writer, 1955
- John de Mol, Jr. Television Producer, 1955
- John Gilmore Programmer, 1955
- John Grisham Novelist, 1955
- John Hutton Politician, 1955
- John Kricfalusi Animator, 1955
- John O. Brennan Public Servant, 1955
- John Paulson Investor, 1955
- John Roberts Lawyer, 1955
- John Roos Diplomat, 1955
- John Skipper Business Executive, 1955
- John Sweeney Politician, 1955
- John Wesley Shipp Actor, 1955
- Jon Porter Politician, 1955
- Judd Rose Journalist, 1955
- Judith Tarr Science Fiction Writer, 1955
- Judy Davis Actress, 1955
- K. Eric Drexler Engineer, 1955
- Karen Tumulty Political Correspondent , 1955
- Kate Mulgrew Television Actor, 1955
- Katharine Weber Novelist, 1955
- Keith Morris Singer-Songwriter, 1955
- Keith Whitley Singer, 1955
- Kelsey Grammer Actor, 1955
- Ken "Spider" Sinnaeve Musician, 1955
- Ken Salazar Politician, 1955
- Kevin Brady Politician, 1955
- Kevin Conroy Actor, 1955
- Kevin Costner Actor, 1955
- Kevin Peter Hall Actor, 1955
- Kevin R. Stone Physician, 1955
- Kevin Shelley Politician, 1955
- Kix Brooks Artist, 1955
- Kris Gopalakrishnan Businessman, 1955
- Kris Jenner Television Presenter, 1955