The KB Extraliga is a rugby club competition played in the Czech Republic and is the top level of rugby in the country. There is promotion between the KB Extraliga and the next (and only other) level down, the KB První Liga. As the name implies, the league is sponsored by Komerční banka (KB).
The season usually runs from September to May, although in the 2008 season, it was only from August through November 2008. Since 2008 the final has been played at the Synot Tip Arena in Prague.
^With the exception of the 2008 season onwards, all finals were played over at least two legs (an additional match being played whenever both teams have won a leg). The score given is that of the deciding match.