FRJ may refer to:
Federal Republic of Yugoslavia (Serbian: ), 1992–2003 Formula Regional Japanese Championship (FRJ championship), a Formula 3 regional racing league Afrijet Airlines, a defunct Nigerian airline, by ICAO airline code Frejus Airport, a former airport in France, by IATA airport code
See also
FRJ-2 nuclear research reactor frjj (Furong Jiejie; born 1977) internet celebrity