RSJ

RSJ may refer to:


 * Religious Sister of St Joseph, post-nominal by members of the Congregation of Sisters of St Joseph of the Sacred Heart
 * Rock Street Journal, an Indian rock magazine
 * Rolled steel joist or I-beam
 * RSJ (band), a metalcore band from York, UK
 * Richard Speight Jr., an actor from Nashville, TN
 * Ricky Stenhouse Jr., American racing driver