LCB may refer to:
- Lecuona Cuban Boys, a Cuban orchestra
- Leonid Chernovetskyi Bloc, a political alliance in Kiev, Ukraine
- Liga Portuguesa de Basquetebol, the main men's basketball league in Portugal
- Lebanese Canadian Bank, a commercial bank in Lebanon
- London Children's Ballet, a children's charity in London
- London Commuter Belt, an alternative name for London's metropolitan area.
- Lactophenol Cotton Blue, used as a stain in the examination of fungi.
- Linear Current Booster, used to match photovoltaic output to motor input