National championships

First-class cricket includes Test cricket but the term is generally used to refer to the highest level of domestic cricket in those countries with full ICC membership, although there are exceptions to this. First-class cricket in England is played for the most part by the 18 county clubs which contest the County Championship. The concept of a champion county has existed since the 18th century but the official competition was not established until 1890. The most successful club has been Yorkshire County Cricket Club with 30 official titles.
Australia established its national first-class championship in 1892-93 when the Sheffield Shield was introduced. In Australia, the first-class teams represent the various states. New South Wales has won the most titles with 45 to 2008.
National championship trophies to be established elsewhere included the Ranji Trophy (India), Plunket Shield (New Zealand), Currie Cup (South Africa) and Shell Shield (West Indies). Some of these competitions have been updated and renamed in recent years.
Domestic limited overs competitions began with England's Gillette Cup knockout in 1963. Countries usually stage seasonal limited overs competitions in both knockout and league format. In recent years, national Twenty20 competitions have been introduced, usually in knockout form though some incorporate mini-leagues.