Leeds Rhinos is an English professional rugby league football club based at Headingley Stadium in North-West Leeds, West Yorkshire. They are the most successful club in the Super League competition history.

The club (then Leeds St Johns) in 1870 and changed its name to Leeds in 1890. In 1895 Leeds was one of the original twenty-two rugby clubs that broke away from the establishment and formed what is now the Rugby Football League, making it one of the world's first rugby league teams. Leeds was one of the twelve clubs to join Super League when the new league format was introduced in 1996. The 'Rhinos' nickname and logo were introduced in 1997. Leeds is owned by the same company that owns the Leeds Carnegie rugby union team.

Leeds won its first Challenge Cup final in 1910, and has gone on to win it eleven more times. The club did not win its first championship until 1961. Since then it has won nine in total, as well as three World Club Challenge titles. Leeds are the reigning Super League champions and are the third most successful rugby league club in England behind only Wigan and St Helens, as judged by the number of combined Championships and Challenge Cups won.