Encyclopedias, Almanacs, Transcripts, and Maps
- Joshua tree
- Joshua Tree National Park
- Josibiah
- Jósika, Miklós, Baron
- Jostedalsbreen
- Josue
- Joubert, Joseph
- Jouett, Matthew Harris
- Jouffroy, Théodore Simon
- Joule's law
- Jourdan, Jean Baptiste
- Jouvenel, Henry de
- Jovellanos, Gaspar Melchor de
- Jozabad
- Jozachar
- József, Attila
- Juan Bautista de Anza National Historic Trail
- Juan de Nova Island
- Juan Manuel, Infante de Castile
- Juana