BLF

BLF may refer to:


 * Bangladesh Liberation Front, also called Mujib Bahini
 * Baluch Liberation Front
 * Billboard Liberation Front
 * Biographical Dictionary of Finland abbreviated BLF in Swedish from Biografiskt lexikon för Finland
 * British Lung Foundation
 * Brotherhood of Locomotive Firemen, forerunner of the Brotherhood of Locomotive Firemen and Enginemen in North America
 * Bruce Lee Foundation
 * Builders Labourers Federation in Australia
 * Mercer County Airport (West Virginia); IATA airport code BLF
 * Buol language of Indonesia (ISO code: blf)
 * Black First Land First a pan-Africanist and revolutionary socialist political party in South Africa
 * Blf, short for "Bluff"; a Street suffix as used in the US