BDK may refer to:
- Big Daddy Kane, an American rapper.
- Bruderschaft des Kreuzes, a professional wrestling stable in Chikara
- Budukh language
- Bukkyo Dendo Kyokai, a Japanese organization devoted to translating and disseminating Buddhist literature
- Bundu dia Kongo, a politico-religious group in Bas Kongo, Democratic Republic of the Congo
- Federation of German Detectives
- Quebec comics, called by some in the 1970s Bande dessinée kébécoise
