LDN

LDN is usually contractional slang for London, UK.

LDN may also refer to:

Arts and media

 * London Daily News, former newspaper
 * BBC London (formerly BBC LDN), broadcasting body
 * "LDN" (song), a 2006 single by Lily Allen

Language

 * Láadan, a feminist, sci-fi conlang (by ISO 639-3 code)

Medicine

 * Licensed Dietitian Nutritionist, a qualified dietician
 * Low-dose naltrexone, off-label use for treatment of immune diseases

Science and technology

 * Day-night average sound level, Ldn or DNL
 * Linked Data Notifications, a communications protocol
 * Lynds' Catalogue of Dark Nebulae, not to be confused with LBN (Lynds' Catalogue of Bright Nebulae)

Transport

 * Llandanwg railway station, Gwynedd, Wales (by National Rail station code)