A limited-overs cricket tournament has been a feature of Australian cricket since the 1969–70 season, branded as the Marsh One-Day Cup for the 2019–20 season. Initially a knockout cup, the competition now features a single round-robin followed by a finals series, with matches limited to 50 overs per side.
The tournament is contested between teams representing the six states of Australia, who also compete in the first-class Sheffield Shield. Three other teams have also played in the tournament for short periods of time: New Zealand’s national team competed in several early tournaments, a team representing Australian Capital Territory participated for a brief period in the late 1990s, and a select Cricket Australia XI took part as the seventh team for three seasons starting with 2015–16. The current champions are Western Australia.