J (disambiguation)
- "J" Is for Judgment
- ATC code J
- Agent J
- Air Jordan
- Bantan Line
- Bessel function
- Bobobo
- Canadian postal code
- Canal J
- Cornelia von Levetzow
- Elgin, Joliet and Eastern Railway
- Frankenstein Girls Will Seem Strangely Sexy
- Guy Big J
- Haplogroup J (Y-DNA)
- Haplogroup J (mtDNA)
- High Court judge (England and Wales)
- Identifying marks on euro coins
- J
- J (Jaehyun album)
- J (Korean singer)
- J (Los Angeles Railway)
- J (New York City Subway service)
- J (element)
- J (musician)
- J (novel)
- J (operating system)
- J (programming language)
- J (psychedelic)
- J Church
- J Dilla
- J Line (Los Angeles Metro)
- J Mascis
- J Mays
- J Records
- J Sharp
- J band (disambiguation)
- J operator
- J-coupling
- J. The Jewish News of Northern California
- J/22
- J/24
- J/80
- J/ψ particle
- JJJ (disambiguation)
- Jahwist
- Jay (disambiguation)
- Jay Jay
- Jay Yuenger
- Jay-Z
- Jaye Muller
- Je (Cyrillic)
- Jezper Söderlund
- Joule
- Kamen Rider J
- Lamborghini Aventador J
- List of military time zones
- Murder Drones
- NZR J class (1939)
- Palatal approximant
- Planet of Giants
- STAYC
- Saviem J
- Three Men in a Boat
- Transilien Line J