Encyclopedias, Almanacs, Transcripts, and Maps
- John the Evangelist
- Johnson, Amy
- Jonas, Hans
- Jones, Absalom
- Jonestown and Peoples Temple
- Joseph of Volokolamsk
- Josephson, Brian David
- Josephus Flavius
- Jötnar
- Joule, James Prescott (1818–1889)
- Journalism and Religion
- Juan Carlos
- Juana Inés de la Cruz de Asbaje y Ramirez
- Judaism: An Overview
- Judaism: Judaism in Asia
- Judaism: Judaism in Northeast Africa
- Judaism: Judaism in Northern and Eastern Europe since 1500
- Judaism: Judaism in Northern and Eastern Europe to 1500
- Judaism: Judaism in the Middle East and North Africa since 1492
- Judaism: Judaism in the Middle East and North Africa to 1492