J20 or J-20 may refer to:
Vehicles
Aircraft
- Chengdu J-20, a Chinese stealth fighter
- Reggiane J 20, an Italian fighter in service with the Swedish Air Force
- Soko J-20 Kraguj, a Yugoslavian light attack aircraft
Automobiles
- Jeep J20, an American pickup truck
- Toyota Land Cruiser (J20), a Japanese off-road vehicle
Locomotives
- LNER Class J20, a British steam locomotive class
Ships
- HSwMS Östergötland (J20), an Östergötland-class destroyer of the Swedish Navy
- INS Nirupak (J20), a Sandhayak-class survey ship of the Indian Navy
Other uses
- J20 Nationell, a Swedish junior hockey league
- Acute bronchitis
- County Route J20 (California)
- DisruptJ20, founded to protest the inauguration of Donald Trump in January 2017
- Elongated pentagonal cupola, a Johnson solid (J20)
- January 20, 2005 counter-inaugural protest, held in Washington, D.C. and other American cities
- Nissan J20, an automobile engine
See also
- J2O, with a letter "O" instead of a zero
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