FLB

FLB may refer to:
 * Brandenburg Football Association (German: Fußball-Landesverband Brandenburg)
 * Breton Liberation Front (French: Front de Libération de la Bretagne), a paramilitary group in France
 * Faint little ball, a Drosophila gene
 * Faulconbridge railway station, in New South Wales, Australia
 * Favourite-longshot bias, in gambling and economics
 * Federal Land Bank, part of the United States Farm Credit System
 * Flashlight Brown, a Canadian punk rock band
 * Fly Linhas Aéreas, a defunct Brazilian airline
 * Frihetliga Ljusdalsbygden, a Swedish political party
 * General Aviation FLB, an American aircraft
 * Lebanese Basketball Federation (French: Fédération Libanaise de Basketball)
 * Stade Francis-Le Blé, a stadium in Brest, France