FJ may refer to:

Places

* Fiji (ISO 3166-1 alpha-2 country code) **

.fj .fj is the country code top-level domain (ccTLD) for Fiji. Domain names can not be registered directly under .fj, but must be registered as a third level name. The .fj TLD was registered in 1992 and is currently administered by The University of ...

, the country code top level domain (ccTLD) for Fiji ** Fijian language (ISO 639-1 language code) *

Fujian Fujian (; alternately romanized as Fukien or Hokkien) is a province on the southeastern coast of China. Fujian is bordered by Zhejiang to the north, Jiangxi to the west, Guangdong to the south, and the Taiwan Strait to the east. Its cap ...

, a province of China

Vehicles

FJ Fury North American FJ Fury (also ''North American F-1 Fury'') may refer to several members of a group of fighter and fighter-bomber aircraft, built by North American Aviation for the US Navy, and related in varying degrees to the F-86 Sabre this firm ...

, an early Cold War fighter aircraft of the US Navy * Flying Junior, a sailing dinghy * Holden FJ, an Australian car * Jeep FJ, a compact delivery van * Toyota FJ Cruiser, a sport utility vehicle * Yamaha FJ, motorcycle

Science and mathematics

* ''The FASEB Journal'', a scientific journal of experimental biosciences * Femtojoule (fJ), an SI unit of energy equal to 10⁻¹⁵ joules * Fritz John conditions, conditions in optimization problems

Media

* FictionJunction, a J-pop group * ''The FJ Holden'', an Australian film

Military

* , German paratroopers * , a military rank of the Bundeswehr * FJ ABM , an anti-ballistic missile * Young Force (), the former youth wing of the ''Fuerza Nueva'' * Youth Front (), a Spanish terrorist organization

Aviation

* Fiji Airways (IATA code) * Williams FJ33 and Williams FJ44, FJ44, families of turbofan jet engines

Other uses

* FJ Management, an American corporation * FJ Reitz High School, a public high school in Evansville, Indiana * Formula Junior, an auto racing class * Sony Vaio FJ, a mid-2000s series of laptops