- J ... jacamar
- jacana ... Jackson Hole National Monument
- Jackson Homestead ... Jackson, Wanda
- Jackson, Wanda Lavonne ... Jacobs, Marion Walter
- Jacobs, Patricia A. ... Jaffna
- Jaffna Peninsula ... Jain vrata
- Jain, Chandra Mohan ... Jām
- Jam Master Jay ... James of Edessa
- James of Palestrina ... jamiyyah al-ʿarabiyyah Lil-wiḥdah al-iqtisādiyyah, al-
- jāmiʿ ... Jang Bahadur
- Jang Hye-Jin ... Janus Geminus
- Janus head ... Japanese horse chestnut
- Japanese horseradish ... Jarbah
- jarcha ... Jaspar, Henri
- Jasper ... Javanese War of Succession, Third
- Javanthropus ... Jayy
- Jayyāsh ... Jeanmaire, Renée
- Jeanmaire, Zizi ... Jehan de Saintré
- Jehangir ... Jencks v. United States
- Jendouba ... jerboa
- Jere ... Jerusalem, Synod of
- Jerusalem, Temple of ... jeté battu
- jeté en tournant ... Jewish festivals
- Jewish Fighting Organization ... Jian ware
- Jian’an ... Jigoku
- Jigoku-zōshi ... Jinan
- Jinān, al- ... Jirgalanta
- Jiří z Poděbrad ... Joachim, Joseph
- Joachim, Saint ... Jockey Club of Britain
- Jockey’s Ridge State Park ... Johannesburg Stock Exchange
- Johannesen, Knut ... John George II
- John George III ... John of Nepomuk, St.
- John of Palermo ... John, Errol
- John, Gospel According to ... Johnson, Charles Spurgeon
- Johnson, Charles Van ... Johnson, Randall David
- Johnson, Randy ... joint disease
- joint distribution ... Jolson, Al
- Jolt ... Jones, Duane
- Jones, Dwight Clinton ... Jones, Samuel
- Jones, Samuel M. ... Jordan, James Daniel
- Jordan, Jeane Duane ... Joseph of Arimathea, St
- Joseph of Volokolamsk, Saint ... jouissance
- joujou de Normandie ... Journey to the Centre of the Earth, A
- Journey to the End of Night ... JSON Web token
- JSP ... Juche
- Juchen ... judgement sampling
- Judges’ Bill ... Juglans nigra
- Juglans regia ... Julian of Norwich
- Julian period ... Jumhurīyat al-Qumur al-Ittiḥādīyah al-Islāmīyah
- Jumhūrīyat al-Yaman ad-Dīmuqrāṭīyah ash-Shaʿbīyah ... Juneteenth
- Juneteenth ... Junkanoo parade
- Junker ... Jurong Bird Park
- Jurong estate ... Justice Party
- Justice Party ... Juventus
- Juventus Football Club ... Jyväskylä
