HLB

HLB may refer to:


 * Halbi language of central India
 * Helium light band, unit of surface flatness
 * Hessian Ludwig Railway (German: Hessische Ludwigsbahn), a former German railway company
 * Hessische Landesbahn, a German transport company
 * High level bombing
 * Hildenborough railway station, in England
 * Hillsborough Resources, a Canadian coal-mining company
 * HLB International, an international network of accountancy firms
 * H.L. Boulton, a Venezuelan import and export company
 * H. L. Bourgeois High School, in Gray, Louisiana, United States
 * Hong Leong Bank, a Malaysian bank
 * Huanglongbing, a disease of citrus fruits
 * Hydrophilic-lipophilic balance, of a surfactant
 * The Helminthosporium Leaf Blights, from their former classification in the genus Helminthosporium:
 * Southern corn leaf blight
 * Northern corn leaf blight
 * Northern corn leaf spot