JR, J. R. or Jr. may refer to:
JRiver Media Center is a multimedia application that allows the user to play and organize various types of media on a computer running Windows, Mac OS X or Linux.
JR Motorsports is an American professional stock car racing team that currently competes in the Xfinity Series.
JRuby is an implementation of the Ruby programming language atop the Java Virtual Machine, written largely in Java.
JR JR, formerly known as Dale Earnhardt Jr. Jr., is an American indie-pop band from Detroit, Michigan, consisting of Daniel Zott and Joshua Epstein.
JR Chandler and Babe Carey are fictional characters of the JR and Babe or Jabe couple from the American daytime drama All My Children.
Ralph Jordon Croucher, better known by his stage name JRDN (born November 14, 1978), is a Canadian R&B recording artist.