RJ, R&J, or Rj may refer to:
Roy Frank "RJ" Mitte III (born August 21, 1992) is an American actor, producer, and model. He is best known for his role as Walter "Flynn" White Jr.
Balaji Patturaj (born 20 June 1985), popularly known as RJ Balaji, is an Indian radio jockey, presenter, comedian and actor based in Chennai, Tamil Nadu.
Ramble Jon Krohn (born May 27, 1976), better known by his stage name RJD2, is an American musician based in Columbus, Ohio.
John Stagikas (born July 31, 1979) is an American professional wrestler, better known by his ring name, RJ Brewer.
RJR Nabisco, Inc., was an American conglomerate, selling tobacco and food products, headquartered in the Calyon Building in Midtown Manhattan, New York City.
Roseo José Dagdag Rosales Jr. (24 March 1974 – 4 December 2011) also known as RJ Rosales, was a Filipino Australian singer, actor, musical theatre performer and TV presenter.
Rodney J. Brown Jr., better known by his stage name RJ, is a rapper from Los Angeles, California. He's known for his frequent collaborations with both YG and DJ Mustard.
The Rjukan Line (Norwegian: Rjukanbanen), at first called the Vestfjorddal Line, was a 16-kilometre (10 mi) Norwegian railway line running through Vestfjorddalen between Mæl and Rjukan in Telemark.