HNK

HNK may refer to:

Croatian National Corpus (Croatian: {{lang|hr|Hrvatski nacionalni korpus}})
Croatian National Theatre (disambiguation) (Croatian: {{lang|hr|Hrvatsko narodno kazalište}})
Fist of the North Star (Japanese: {{lang|ja-Latn-hepburn|Hokuto no Ken}}) a manga and its franchise
Honokiol, a lignan
Hydroxynorketamine, a metabolite of ketamine
Land of the Lustrous (Japanese: {{lang|ja-Latn-hepburn|Hōseki no Kuni}}) a manga
Hrvatski nogometni klub, a number of Croatian football clubs have HNK in their official name