UJR

UJR may refer to:


 * Rebellion Youth Union, the youth wing of the Revolutionary Communist Party in Brazil
 * Unanimous justified representation, a criterion for evaluating the fairness of electoral systems
 * Unsecured Judicial Release, a term for personal recognizance bonds used in some jurisdictions
 * the airline code for Universal Jet Rental de Mexico
 * União do Judaismo Reformista, the regional organisation of the World Union for Progressive Judaism in Brazil