The World Clan League was the biggest ever competitive gaming league for Mario Kart Wii. Founded by [Rv]Bash in 2008 it lasted 12 seasons and gave many thousands of players the oppportunity to prove themselves in a competitive environment.

The International League was the major Mario Kart Wii competitive league after the WCL was shut down.

Mario Kart Championships by TITAN. More information to be added at a later date.

The Wiimmfi League (formerly known as the Custom Server League) is the only competitive Mario Kart Wii league that is still active today. The matches are played on Wiimmfi, the custom servers provided by Wiimm.