LDK may refer to:
Arts and entertainment L DK, a romantic comedy manga (first published 2014–2017) L.D.K. Lounge Designers Killer, a 2005 album by Capsule
Businesses and organisations LDK Solar Co, a Chinese solar wafer manufacturer , an Indonesian Islamic student organisation , a political party in Kosovo
Places Lidköping-Hovby Airport, Sweden (IATA:LDK) Grand Duchy of Lithuania, a mediaeval European state () Lycée de Kigali, a secondary school in Rwanda
Other uses Living room, Dining room, Kitchen, in Japanese accommodation Ceritinib or LDK378, a cancer drug