HJ may refer to:
Hjalmar Horace Greeley Schacht (22 January 1877 – 3 June 1970) was a German economist, banker, liberal politician, and co-founder in 1918 of the German Democratic Party.
The HJ-8 or Hongjian-8 ("红箭-8" translated as "Red Arrow-8") is a second generation tube-launched, optically tracked, wire-guided anti-tank missile system which was originally deployed by the Chinese People's Liberation Army since the late 1980s.
Hjalmar "Hjallis" Johan Andersen (12 March 1923 – 27 March 2013) was a speed skater from Norway who won three gold medals at the 1952 Winter Olympic Games of Oslo, Norway.
Hjalmar Peterson was a singer and comedian from Sweden, who achieved great popularity during the 1910s and 1920s.
HJ Bunko (HJ文庫) is a publishing label affiliated with the Japanese publishing company Hobby Japan. It was established in July 2006 and is a light novel label that is aimed at a young adult male readership.
HJ-10 (HJ = Hong Jian or Hongjian, 红箭, meaning Red Arrow) is a series of indigenously developed and highly classified (as of 2011) Chinese anti-helicopter / anti-tank missiles, they are the primary weapon of the CAIC WZ-10 attack helicopter.
Hjörtur Hermannsson (born 8 February 1995) is an Icelandic professional footballer who currently plays for Brøndby IF as a centre back.
Hjaðningavíg (the "battle of the Heodenings"), the legend of Heðinn and Hǫgni or the Saga of Hild is a Scandinavian legend from Norse mythology about a never-ending battle which is documented in Sörla þáttr, Ragnarsdrápa, Gesta Danorum, Skíðaríma and in Skáldskaparmál.
Hjernevask ("Brainwash") is a Norwegian science documentary miniseries that aired on NRK1 in 2010. The series, consisting of seven episodes, was created and presented by the comedian and sociologist Harald Eia.