LDB may refer to:
Music The Little Drummer Boy, a Christmas song LDB Challenge, to avoid hearing the song Kelton "LDB" Kessee (born 1981), drummer of R&B group IMx
Organisations Land development bank, a type of bank in India Liga de Desenvolvimento de Basquete, a Brazilian under-22 basketball league Liquor Distribution Branch, a Canadian governmental body The Louis D. Brandeis Center for Human Rights under Law, a Jewish non-profit
Rail Lake railway station, Isle of Wight (GBR:LDB) Lordsburg (Amtrak station), New Mexico, US (Amtrak:LDB)
Other uses Light-dark box test, an animal model used in pharmacology Long duration ballooning, a program of the Columbia Scientific Balloon Facility