| Fromdate | 2 July 2004 |
|---|---|
| Todate | 7 August 2004 |
| Administrator | England and Wales Cricket Board |
| Cricket format | Twenty20 |
| Tournament format | Group stage and knockout |
| Champions | Leicestershire Foxes |
| Count | 1 |
| Participants | 18 |
| Matches | 52 |
| Most runs | Darren Maddy (356 for Leicestershire) |
| Most wickets | Adam Hollioake (20 for Surrey) |
| Previous year | 2003 |
| Previous tournament | 2003 Twenty20 Cup |
| Next year | 2005 |
| Next tournament | 2005 Twenty20 Cup |
The 2004 Twenty20 Cup was the second edition of what would later become the T20 Blast competition, England's premier domestic Twenty20 competition.. The finals day took place on 7 August at Edgbaston, Birmingham, and was won by the Leicestershire Foxes.
Points table
| Team | Pld | W | L | T | NR | Pts | NRR |
|---|---|---|---|---|---|---|---|
| Glamorgan Dragons | 5 | 4 | 1 | 0 | 0 | 8 | +0.439 |
| Warwickshire Bears | 5 | 3 | 2 | 0 | 0 | 6 | +0.611 |
| Worcestershire Royals | 5 | 3 | 2 | 0 | 0 | 6 | –0.275 |
| Somerset Sabres | 5 | 2 | 2 | 0 | 1 | 5 | –0.389 |
| Gloucestershire Gladiators | 5 | 1 | 3 | 0 | 1 | 3 | –0.379 |
| Northamptonshire Steelbacks | 5 | 1 | 4 | 0 | 0 | 2 | –0.464 |
| Team | Pld | W | L | T | NR | Pts | NRR |
|---|---|---|---|---|---|---|---|
| Leicestershire Foxes | 5 | 3 | 1 | 0 | 1 | 7 | +0.215 |
| Lancashire Lightning | 5 | 3 | 2 | 0 | 0 | 6 | +0.276 |
| Derbyshire Phantoms | 5 | 2 | 2 | 0 | 1 | 5 | –0.036 |
| Durham Dynamos | 5 | 2 | 3 | 0 | 0 | 4 | +0.265 |
| Nottinghamshire Outlaws | 5 | 2 | 3 | 0 | 0 | 4 | –0.556 |
| Yorkshire Phoenix | 5 | 2 | 3 | 0 | 0 | 4 | –0.108 |
| Team | Pld | W | L | T | NR | Pts | NRR |
|---|---|---|---|---|---|---|---|
| Surrey Lions | 5 | 4 | 0 | 0 | 1 | 9 | +2.137 |
| Hampshire Hawks | 5 | 3 | 2 | 0 | 0 | 6 | +0.326 |
| Essex Eagles | 5 | 2 | 2 | 0 | 1 | 5 | +0.529 |
| Kent Spitfires | 5 | 2 | 3 | 0 | 0 | 4 | –0.207 |
| Middlesex Crusaders | 5 | 1 | 3 | 0 | 1 | 3 | –1.235 |
| Sussex Sharks | 5 | 1 | 3 | 0 | 1 | 3 | –1.716 |