LB, lb or lb. may refer to:
LBC (originally the London Broadcasting Company) is a London-based national talk and phone-in radio station.
LBJ is a 2016 American political drama film directed by Rob Reiner and written by Joey Hartstone, whose script was on the 2014 Black List.
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.
The LBD-1 Gargoyle (later KSD-1, KUD-1 and RTV-N-2) was an American air-to-surface missile developed during World War II by McDonnell Aircraft for the United States Navy.
LBV 1806-20 is a candidate luminous blue variable (LBV) and likely binary star located nearly 40,000 light-years from the Sun, towards the center of the Milky Way.