SFJ may refer to:

• Saphenofemoral junction, an anatomical structure in the groin
• StarFlyer (ICAO airline code)
• Kangerlussuaq Airport (IATA airport code)
• Super Formula Japan, a Japanese car-racing championship

• Dagmar Täube
• Dagmar Uebelhor
• Dagmar Uebelhör
• Dagmawit Girmay Berhane
• Dagmawit Moges
• Dag Meoushan
• Dagmāra Legante
• Dagnall, Charles
• Dagnall (disambiguation)
• Dag nasty
• Dagne Ciuksyte
• Dagne Crane
• Dagne Čiukšytė
• Dagnin
• Dagnis Iljins
• Dagnis Iļjins
• Dag (Norwegian TV series)
• Dagny (artist)
• Dagny Berger
• Dagny Carlsson
• Dagny Kristjansdottir
• Dag Nylander
• Dagny Linda Kristjansdottir
• Dagny (magazine)
• Dagny norvoll sandvik