NRB

NRB is an initialism or code that may refer to:


 * National Reconstruction Bureau, Pakistani government institution for economic recovery and prosperity
 * National Religious Broadcasters, international association of Christian communicators
 * Nederlandse Rugby Bond, Dutch rugby union governing body
 * Nepal Rastra Bank, central bank of Nepal
 * New Research Building, Harvard University biomedical research facility
 * Nil-rate band, which establishes the amount someone can inherit without paying inheritance tax in the United Kingdom
 * Non-rebreather mask, device used for emergency oxygen therapy
 * Norbury railway station, England (station code NRB)
 * Nuclear Recycle Board, part of Bhabha Atomic Research Centre in India
 * People's Republic of Bulgaria (Народна република България, Narodna Republika Balgariya)