LGB may refer to:
- La Grande Boissière, the largest campus of the International School of Geneva
- Laser-guided bomb, a guided bomb that uses semi-active laser homing to strike a designated target with greater accuracy than an unguided bomb
- Lateral geniculate body in human brain, a.k.a., lateral geniculate nucleus
- Lectures on Government and Binding: The Pisa Lectures, a book by American linguist Noam Chomsky
- "LGB", a term for lesbian, gay, and bisexual people, sharing history with term " LGBT"
- LGB (trains), brand in model railroading
- Little Golden Books, a popular series of children's books
- Long Beach Airport, in California by IATA-Code
- Lou Gramm Band, a band led by Lou Gramm
LGB stands for Lehmann Gross Bahn - the "Lehmann Big Railway" in German. Made by Ernst Paul Lehmann Patentwerk in Nuremberg, Germany, since 1968 and by Märklin since 2007, it is the most popular garden railway model in Europe, although there are also many models of U.S. and Canadian prototypes. LGB caused a revival of garden model railroading in the United States when it was introduced. LGB is sold in North America through Walthers, who took over from Ernst Paul Lehmann's subsidiary, LGB of America, when Märklin bought the LGB assets. Most of the European prototypes were manufactured in Germany, while much of the North American rolling stock was made in China. Production is now located in Hungary.
LGB trains are responsible for introducing "G" scale to model railroading. The scale ratio used by LGB is nominally 1:22.5, yet many dimensions are often changed to allow operation on very tight R1 curves. American prototypes especially suffer from this. Other G-scale (and Gauge 1) manufacturers produce products that range from 1:20 to 1:32, and for the most part, all use the same track and are compatible with one another. Though they can all run on the same track (45 mm gauge), models representing narrow-gauge versions of trains or locomotives would not normally be run together with models of larger full-scale vehicles. To fit the same standard track the latter must be built using different scales. To illustrate the point, 1:22.5 scale passengers and/or train crew are somewhat oversized when displayed in proximity with 1:32 models. Though the models may be physically compatible, many people choose a style or era to fit their desires and pick one ratio (in the range of 1:20.3 to 1:32) to model all of their trains.
One of the most prominent aspects of LGB trains over other model railroad models is their durability. All locomotives, track, and accessories of the main product line function in rain and snow allowing nearly anyone to have an outdoor garden railroad. As a matter of fact, there have been cases when LGB products have survived against all odds. Apparently, an LGB controller was once caught in a flood in early spring; not only was it completely submerged, but the water actually froze solid around it the next day when the temperature dropped. After the controller thawed out, it was taken inside and set next to a heater to dry. Against all odds, the product apparently worked fine, as if nothing had happened.
The first loco made under the LGB brand was a model of a small Austrian 0-4-0 named "Stainz." This loco appears in the LGB logo and is still in production today, although it now has a sound system and other mechanical differences to the original 1968 model. Most garden railway enthusiasts have at least one example of a Stainz in their collection as it tends to be a robust loco with good pulling power.