| Winner | Runner-up | |
| Twenty20 Cup | ||
| 2003 | Surrey | Warwickshire |
| 2004 | Leicestershire | Surrey |
| 2005 | Somerset | Lancashire |
| 2006 | Leicestershire | Nottinghamshire |
| 2007 | Kent | Gloucestershire |
| 2008 | Middlesex | Kent |
| 2009 | Sussex | Somerset |
| Friends Provident T20 | ||
| 2010 | Hampshire | Somerset |
| Friends Life T20 | ||
| 2011 | Leicestershire | Somerset |
| 2012 | Hampshire | Yorkshire |
| 2013 | Northamptonshire | Surrey |
| NatWest T20 Blast | ||
| 2014 | Warwickshire | Lancashire |
| 2015 | Lancashire | Northamptonshire |
| 2016 | Northamptonshire | Durham |
| 2017 | Nottinghamshire | Warwickshire |
| Vitality Blast | ||
| 2018 | Worcestershire | Sussex |
| 2019 | Essex | Worcestershire |
| 2020 | Nottinghamshire | Surrey |
| 2021 | Kent | Somerset |
| 2022 | Hampshire | Lancashire |
| 2023 | Somerset | Essex |
| 2024 | Gloucestershire | Somerset |
| 2025 | Somerset | Hampshire |
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