HJK may stand for:
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Helsingin Jalkapalloklubi
Helsingin Jalkapalloklubi (), commonly known as HJK Helsinki (), or simply as HJK (), is a Finnish Association football, football club based in Helsinki. The club competes in Veikkausliiga, the top division of the Finnish football league system. ...
(HJK Helsinki), an association football club, Finland
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Helsingin Jalkapalloklubi (women), an association football club, Helsinki, Finland
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Helsingin Jalkapalloklubi (ice hockey), Finnish ice hockey club.
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Helsingin Jääkiekkoklubi (HJK Helsinki), Finnish ice hockey club.
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Hærens Jegerkommando, Norwegian special forces unit
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