LDN is usually contractional slang for

London London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary dow ...

, UK. LDN may also refer to:

Arts and media

London Daily News The ''London Daily News'' was a short-lived London newspaper owned by Robert Maxwell. It was published from 24 February to 23 July 1987. History The ''London Daily News'' was intended to be a "24-hour" paper challenging the local dominance of t ...

, former newspaper *

BBC London BBC London is the BBC English Region producing local radio, television, teletext and online services in London and parts of the surrounding area. Its output includes the daily ''BBC London News'' and weekly '' Sunday Politics'' on television, ...

(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)

Science and technology

* Low dose naltrexone *

Day-night average sound level The day-night average sound level (Ldn or DNL) is the average noise level over a 24-hour period. The noise level measurements between the hours of 10pm and 7am are artificially increased by 10 dB before averaging. This noise is weighted to take in ...

, Ldn or DNL * Linked Data Notifications, a communications protocol

Transport

Llandanwg railway station Llandanwg railway station is in the village of Llandanwg in Gwynedd, Wales. It is an unstaffed halt on the Cambrian Coast Railway with direct passenger services to Harlech, Porthmadog and Pwllheli to the north and west, and Barmouth, Machynlleth, ...

, Gwynedd, Wales (by National Rail station code) {{disambig