LB, lb or lb. may refer to:
Businesses and organizations
- L Brands, an American clothing retailer
- Lane Bryant, a plus-size clothing retailer
- Laurier Brantford, a satellite campus of Wilfrid Laurier University in Brantford, Ontario, Canada
- Movement for Unification (Albanian: Lëvizja për Bashkim), a nationalist Albanian political party in Kosovo
- Ljubljana Bank (Slovene: Ljubljanska banka), a bank named after and based in Ljubljana, Slovenia that operated in SFR Yugoslavia
- Lloyd Aéreo Boliviano airline (IATA code)
- LB.ua (Left Bank (online edition), a Ukrainian online newspaper
Places
- Labrador (former postal abbreviation)
- Lebanon (ISO 3166-1 alpha-2 country code)
- Long Beach, California
- Los Baños, Laguna (an abbreviation commonly used to address the town of Los Baños)
Science and technology
Mathematics and computing
- .lb, the Internet country code top-level domain (ccTLD) for Lebanon
- Lattice Boltzmann methods, a class of computational fluid dynamics (CFD) methods for fluid simulation
- Liberty BASIC, a programming language
- Binary logarithm, lb(n) = log2(n)
- Lower bound, a mathematical concept in order theory
Units of measurement
- Pound (mass), abbreviation derived from Latin libra
- Pound-force
Other uses in science and technology
- L-shaped electrical conduit body with the outlet in the Back ("LB")
- Lysogeny broth (also known as Luria or Luria-Bertani broth), a microbial growth medium
Sport
- Left back, a defensive position in Association football
- Linebacker, a position in American and Canadian football
Other uses
- LB (car ferries), one of several ferries on the HH Ferry route between Elsinore, Denmark and Helsingborg, Sweden
- Luxembourgish language (ISO 639 alpha-2 code)
- Letterboxing (filming)