Narrowest Margin of Runs Defeat
| 1 run | by Worcestershire | Edgbaston, Birmingham | 2019 | tt8186 |
| 1 run | by Warwickshire | Edgbaston, Birmingham | 2022 | tt10909 |
| 2 runs | by Leicestershire | Trent Bridge, Nottingham | 2017 | tt6441 |
| 2 runs | by Hampshire | Trent Bridge, Nottingham | 2021 | tt9936 |
| 3 runs | by Somerset | The Rose Bowl, Southampton | 2010 | tt1893 |
| 3 runs | by Durham | Trent Bridge, Nottingham | 2014 | tt4358 |
| 3 runs | by Lancashire | Emirates Old Trafford, Manchester | 2019 | tt8023 |
| 4 runs | by Leicestershire | Trent Bridge, Nottingham | 2006 | tt461 |
| 5 runs | by Leicestershire | Grace Road, Leicester | 2008 | tt975 |
| 8 runs | by Durham | Riverside Ground, Chester-le-Street | 2009 | tt1257 |
| 8 runs | by Northamptonshire | Edgbaston, Birmingham | 2016 | tt5880 |
| 8 runs | by Yorkshire | Trent Bridge, Nottingham | 2023 | tt12244 |
| 9 runs | by Derbyshire | Trent Bridge, Nottingham | 2004 | tt87 |
| 9 runs | by Yorkshire | Trent Bridge, Nottingham | 2025 | tt15242 |
| 11 runs | by Lancashire | Old Trafford, Manchester | 2009 | tt1241 |
| 13 runs | by Worcestershire | Trent Bridge, Nottingham | 2017 | tt6360 |
| 14 runs | by Leicestershire | Grace Road, Leicester | 2006 | tt365 |
| 16 runs | by Derbyshire | Trent Bridge, Nottingham | 2013 | tt3742 |
| 17 runs | by Leicestershire | Trent Bridge, Nottingham | 2018 | tt7059 |
| 18 runs | by Yorkshire | Headingley, Leeds | 2003 | tt45 |
| 18 runs | by Warwickshire | Trent Bridge, Nottingham | 2014 | tt4381 |
| 18 runs | by Warwickshire | Trent Bridge, Nottingham | 2021 | tt9643 |
| 19 runs | by Somerset | The Cooper Associates County Ground, Taunton | 2018 | tt7175 |
| 20 runs | by Worcestershire | Trent Bridge, Nottingham | 2015 | tt5012 |
| 20 runs | by Worcestershire | Trent Bridge, Nottingham | 2024 | tt13726 |
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