2009 Twenty20 Cup
| Dates | 25 May 2009 – 5 August 2009 |
|---|---|
| Administrator(s) | England and Wales Cricket Board |
| Cricket format | Twenty20 |
| Tournament format(s) | Group stage and knockout |
| Champions | Sussex Sharks (1st title) |
| Participants | 18 |
| Matches | 97 |
| Most runs | Jonathan Trott(525 for Warwickshire) |
| Most wickets | Alfonso Thomas(18 for Somerset) |
The 2009 Twenty20 Cup was the seventh edition of what would later become the T20 Blast competition for English and Welsh county clubs. The finals day took place on 15 August at Edgbaston, and was won by the Sussex Sharks.