RDK may refer to:
- Reichsbund der Kinderreichen, a defunct German Natalist group
- Russian Volunteer Corps, a Russian nationalist paramilitary unit, fighting for the side of Ukraine. (Russkiy dobrovolcheskiy korpus)
- RDK, the FAA LID code for Red Oak Municipal Airport, Iowa, United States
This disambiguation page lists articles associated with the title RDK.
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