LB, lb or lb. may refer to:
LBC (originally the London Broadcasting Company) is a London-based national phone-in and talk radio station.
The LBC Crew (Long Beach City Crew) is a collective of Long Beach-based rappers. They were the first act to be executively-produced by Snoop Dogg.
LBV 1806-20 is a candidate luminous blue variable (LBV) and likely binary star located around 28,000 light-years (8,700 pc) from the Sun, towards the center of the Milky Way.