JL can refer to:
- People
- John Lennon, a singer, songwriter, vocalist and guitarist of The Beatles
- John Linnell, singer/songwriter/keyboardist of the alternative rock band They Might Be Giants
- James LaBrie, the vocalist of Dream Theater
- Jennifer Lopez, an American singer and dancer
- Jerry Lynn, a professional wrestler
- Justin Langer, a former Australian cricket player
- Jushin Liger, a professional wrestler
- Products, companies and brands
- JL Audio, a manufacturer of consumer audio products
- the clothing brand created by Johan Lindeberg
- A range of military technology developed by/in conjunction with the People's Republic of China, including the JL-2 (missile), the JL-8 (aircraft), and the JL-10A (Radar system)
- Other
- Mount Lebanon Governorate, ISO 3166-2:LB code
- The IATA airline designator for Japan Airlines
- Jaunais laiks, or New Era Party, a Latvian political party
- Jilin, China
- Jubilee line, a London Underground line
- Justice League (DC Comics)
- Jay Limo, a minor character in the film Cars
Jl or Jl. can refer to:
- Book of Joel