Please read the information about this list on User:SirJective/Parenthesis before working with it!
- J'nanin (Myst) (r) - J'nanin
- Jabir Ibn Haiyan (Geber) (r) - Jabir Ibn Haiyan
- Jackson Avenue (New York Subway) - Jackson Avenue
- Jacques Bonsergent (Paris Metro) - Jacques Bonsergent
- Jaffas (candy) - Jaffas
- Jaffas (chocolate) (r) - Jaffas
- Janssen (Lunar crater) - Janssen
- Jasmin (Paris Metro) - Jasmin
- Jaurès (Paris Metro) - Jaurès
- Javel (Paris Metro) - Javel
- Javel André Citroën (Paris Metro) - Javel André Citroën
- Jawbone (instrument) - Jawbone
- Jean Duceppe (television) - Jean Duceppe
- Jehan (crater) - Jehan
- Jen (Power Rangers) - Jen
- Jen Scotts (Power Rangers) (r) - Jen Scotts
- Jerahmeel (archangel) - Jerahmeel
- Jesus Christ Superstars (album) - Jesus Christ Superstars
- JFK-UMass Station (Massachusetts Bay Transportation Authority) - JFK-UMass Station
- JimmyYoung (disc jockey) (r) - JimmyYoung
- Jodie (Sesame Street) - Jodie
- Johalva (Fire Emblem) (r) - Johalva
- Johan (Fire Emblem) (r) - Johan
- John Cockroft (politician) - John Cockroft
- John Forbes Nash Jr. (mathematician) (r) - John Forbes Nash Jr.
- John Rennie, (1761-1821) (r) - John Rennie,
- Johnny B. (Jerky Boys) (r) - Johnny B.
- Johnny Owen (boxer) - Johnny Owen
- Join the Dots: B-Sides and Rarities, 1978-2001 (The Fiction Years) - Join the Dots: B-Sides and Rarities, 1978-2001
- Joinville-le-Pont (Paris Metro) - Joinville-le-Pont
- Joker's WIld (song) (r) - Joker's WIld
- Jonahtan Edwards (music) (r) - Jonahtan Edwards
- Joseph Ward (1838) - Joseph Ward
- Josia Bartlet (fictional) (r) - Josia Bartlet
- Jourdain (Paris Metro) - Jourdain
- Jules Joffrin (Paris Metro) - Jules Joffrin
- Jump Start (comic) - Jump Start
- Junction Boulevard (7-Flushing) - Junction Boulevard
- Junction Boulevard (New York Subway) - Junction Boulevard
- Junlus Street (New York Subway) - Junlus Street
- Jussieu (Paris Metro) - Jussieu