2011–12 Ryobi One-Day Cup
| Administrator(s) | Cricket Australia |
|---|---|
| Cricket format | Limited overs cricket |
| Tournament format(s) | Round-robin tournament |
| Champions | Southern Redbacks (3rd title) |
| Participants | 6 |
| Matches | 25 |
| Most runs | Michael Klinger (South Australia) (498) |
| Most wickets | Alister McDermott (Queensland) (16) |
The 2011–12 Ryobi One-Day Cup was the 42nd season of official List A domestic cricket in Australia.
The season's format reverted to the 50-overs a side format, with Cricket Australia acknowledging the ICC's commitment to 50-over cricket and the 2015 ICC World Cup most likely be staged as a 50-over tournament. Unlike previous seasons, the competition was not a "complete double round robin", and each state played eight preliminary matches instead of ten.
The 2011–12 competition was won by the South Australian Redbacks. The final's result was a tie, but the Redbacks had gained a "bonus point" in the round robin series that put them ahead of the Tasmanian Tigers. The win was South Australia's first One-day domestic title in 25 years.