- j ... jacaranda
- jacaranda ... Jackson v. Birmingham Board of Education
- Jackson’s Dilemma ... Jacksonburgh
- Jacksonian Democracy ... Jacobsen, Hans Jakob
- Jacobsen, Jens Peter ... Jagannatha
- Jagannāthā Dās ... Jaipur
- Jaipur ... jāmah
- Jamaica ... James Watt on the steam engine
- James Webb Space Telescope ... Jammeh, Yahya Abdul
- Jammes, Francis ... Janitor Who Paints, The
- Janizary ... Japan Federation of Employer’s Associations
- Japan New Party ... Japanese Orthodox Church
- Japanese oyster ... Jarillo-Herrero, Pablo
- Jarīr ... Jászság
- Jat ... Jawahar Kala Kendra
- Jawahar Tunnel ... jazz-rock
- Jazz: Hot and Hybrid ... Jebeleanu, Eugen
- Jebero language ... Jelačić, Josip, Count
- Jelālī Revolts ... Jenkinson, Charles
- Jenkinson, Robert Banks ... Jerobaal
- Jeroboam ... Jessore
- Jest of God, A ... Jeux
- jeux direct ... Jews Without Money
- Jews’ College ... Jianye
- Jianzhou ... jill
- Jiloá, Lake ... Jingtai
- jingtian ... Jiyangzi
- Jiyū-Minshutō ... João o Afortunado
- João o Bastardo ... Joenckema, Rembert van
- Joensen, Martin ... John
- John & Francis Baring & Company ... John III Sobieski
- John Inglesant ... John the Posthumous
- John the Redhead ... Johns Hopkins University
- Johns Island ... Johnson, James William
- Johnson, Jamey ... Johnston, Hannah Clark
- Johnston, Harriet Lane ... Jokes and Their Relation to the Unconscious
- Jokha, Tell ... Jonathan, Goodluck
- Joncs, Plaine des ... Jones, Jonathon
- Jones, Joseph Rudolph ... Jónsson, Arngrímur
- Jónsson, Finnur ... Jōsai Daishi
- Josaphat ... Joshua, Anthony
- Joshua, Book of ... Journal of My Life, The
- Journal of My Travels in the Year 1769 ... Joyce, James Augustine Aloysius
- Joyce, Mike ... Juazeiro
- Juazeiro do Norte ... Jude, Epistle of
- Jude, Letter of ... judo
- jūdōgi ... Jules Rimet Trophy
- Jules Verne ... Juluka
- Julus ... junco
- Junco hymenalis ... Junimea
- Junín ... Jurassic System
- Jurassic World ... Just So Stories
- Just the Way You Are ... Jutra, Claude
- Juturnae, Lacus ... Jyväskylä
