RJ, R&J, or Rj may refer to:
Arts and entertainment
- Radio jockey, a person who hosts a radio talk show
- RJ, a raccoon in the comic strip and feature film Over The Hedge
- R.J. MacReady, the helicopter pilot in the 1982 sci-fi/horror film The Thing
- RJ, an alpaca in the BT21 brand of Line Friends
Businesses and organizations
- R. J. Reynolds Tobacco Company
- Las Vegas Review-Journal, major daily newspaper in Nevada
- Les Brasseurs RJ, a brewery in Québec
- Royal Jordanian airlines, of Jordan (IATA airline designator RJ)
People
In arts and entertainment
- RJ (rapper) (born 1984), American rapper
- RJ Mitte (born 1992), American actor
- RJ Rosales (1974–2011), Australian-Filipino actor and singer
- R. J. Haddy, special effects artist, contestant on seasons 2 and 5 of the TV series Face Off
- R. J. Helton (born 1981), an American Idol finalist
- Ron Jeremy (born 1953), pornographic actor
- R.J.Pradip (born 1994), Indian journalist
- RJ Cyler (born 1995), American actor
In sport
- RJ Barrett (born 2000), Canadian professional basketball player for the New York Knicks
- Richard Jefferson (born 1980), former American professional basketball player
- Rick Jeanneret (born 1942), Canadian hockey announcer for the Buffalo Sabres
- Roy Jones, Jr. (born 1969), former American boxer
In other fields
- Robert J. Mical (born 1956), inventor and engineer
Places
- Rio de Janeiro, a Brazilian city
- Rio de Janeiro (state), a state in Brazil
In technology
- Registered jack, a standardized telecommunication network interface
- Regional jet, a 35- to 100-passenger class of short-haul airliner
- Boeing RC-135 Rivet Joint, an American intelligence-gathering aircraft
Other uses
- Reproductive justice, a concept that links reproductive rights with social justice
- Rim job, a sexual act
- The R Journal, with the ISO abbreviation R J.