HDK may refer to:
- HDK (band), Dutch death metal band
- H. D. Kumaraswamy (born 1959), Indian politician
- Hot Desert Knights, an American gay pornography studio
- School of Design and Crafts, (Swedish: ), in Gothenburg, Sweden
HDK (Hate, Death, Kill) is a musical project of Dutch guitarist Sander Gommans, best known as member, vocalist and one of the main composers of the now dissolved symphonic metal band After Forever.