LBB may stand for:
Lactobacillus delbrueckii subsp. bulgaricus, a bacterium used in the production of yogurt Ladyzhenskaya–Babuška–Brezzi condition, in mathematics Laura Bell Bundy (born 1981), an actress and singer Little Baby Bum, a British CGI children's animated web series Little brown bird, name given to an unidentified species Little Black Book (disambiguation) Lubbock Preston Smith International Airport, by IATA code Lebak Bulus MRT station, a rapid transit station in Jakarta, Indonesia