- Iulian Chivu
- Iustina Cojocaru
- J. C. Stevens
- J. D. Marquette
- J. T. Addison
- Jack Killen
- Jack Kornfield
- Jacqueline Salmon
- Jacques De Voragine
- Jacques Salome
- Jae - Sheen Yu
- James A. Hall
- James David Dunn
- James Endredy
- James Fadiman
- James Hollis
- Jamgon Kongtrul
- Jan Patocka
- Janet Tolan
- Janina Fisher
- Jean - Marie Ragon
- Jean - Paul Dubreuil
- Jean Chevalier
- Jean D`Espagnet
- Jean Danielou
- Jean Klein
- Jean Mallinger
- Jean Marques - Riviere
- Jean Shinoda Bolen
- Jean Tourniac
- Jean Varenne
- Jean-Marc Kespi
- Jeanne De Salzmann
- Jeffrey Brantley
- Jeffrey C. Wood
- Jennifer Sweeton
- Jerry Wyckoff
- Jessica McCabe
- Jiddu Krishnamurti
- Jinarajadasa Curuppumullage
- Jirah Dewey Buck
- Johann Valentin Andreae
- Johannes Trithemius
- John Blofeld
- John Coleman
- John Dee
- John Dewey
- John E. Upledger
- John G. Neihardt
- John George Woodroffe
- John Hick
- John J. Ratey
- John Kim
- John Noyce
- John R. Searle
- John William Draper
- Jon Kabat - Zinn
- Joseph Campbell
- Joseph Fort Newton
- Joseph Goldstein
- Joshua Abelson
- Joshua Trachtenberg
- Jules Loiseleur
- Kabir
- Kahlil Gibran
- Kaiten Nukariya
- Kanada
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- Karina Iohanna Botis
- Karl Barth
- Karl Gjellerup
- Karla McLaren
- Karlfried Graf Durckheim
- Kathleen Mcdonald
- Kathlyn Hendricks
- Keith Kurlander
- Kekuni Minton
- Kim Paleg
- Konrad Dietzfelbinger
- Koun Yamada
- Kyriacos C. Markides
- Lama Anagarika Govinda
- Lama Yeshe
- Lao Zi
- Laura A. Baker
- Laura Andronic
- Laura Chirodea
- Laura Frunza
- Laura-Madalina Micu
- Laurence Heller
- Laurentiu Malomfalean
- Laurian Kertesz
- Lavinia Barlogeanu
- Lavinia Tanculescu-Popa
- Lawrence Howells
- Lawrence J. Cohen
- Lenny Ravich
- Leo Schaya
- Leon D`Hervey De Saint-Denys
- Leonard Mlodinow