RB or Rb may stand for:
People R. B. (nickname) Rebecca Black, an American pop singer Richard Blackwood, a British rapper
Places R. B. Winter State Park, a park in Pennsylvania Rancho Bernardo, a community in San Diego, California, United States
Arts and entertainment Rhythm and blues, a music genre combining blues, gospel and jazz influences Rock Band, a music video game series Rock Band (video game), the game of the same name Ultraman R/B, a Japanese television series
Businesses Rankin/Bass, an American production company, known for its seasonal television specials Ray-Ban, a sunglasses company Reckitt Benckiser, a company in the United Kingdom Red Bull, an Austrian energy drink brand Syrian Arab Airlines (IATA airline code RB)
Government and politics Radio Bremen, a public broadcaster for the German state of Bremen Railway Bureau (disambiguation), any government agencies for railway of several countries Parti de la Renaissance du Bénin or Benin Rebirth Party, a political party in Benin República Bolivariana, Spanish-language phrase for the type of government in Venezuela Rupiah Banda, President of Zambia
Science and technology
.rb, the file extension for documents created in Ruby or in REAL Basic Rebar (short for reinforcing bar), used in reinforced concrete structures Retinoblastoma, a childhood cancer of the eyes caused by a mutation in the retinoblastoma protein Retinoblastoma protein, a tumor suppressor protein Rubidium, symbol Rb, a chemical element Reflected binary code, Gray code Romano-British culture, an archaeological culture Request Block, a task-related control block in OS/360 and successors.
Vehicles and transportation Hyundai RB (buses), a series of Korean buses SJ Rb, a Swedish locomotive Nissan RB engine, a gasoline engine made by Nissan Rail Baltica, railway network across the Baltic states Re-entry body, the US Air Force term for a re-entry vehicle Regionalbahn, a type of train in Germany Réseau Breton, a French railway network in Brittany
Sport Racing Bulls, Formula One racing team RB Leipzig, German football club Right back, a defensive position in association football Running back, a position in North America football
Other uses Rowboat
See also Royal Bank (disambiguation)