| 105 runs | by Gloucestershire | Uxbridge Cricket Club Ground, Uxbridge | 2011 | tt2278 |
| 98 runs | by Kent | The Cloud County Ground, Chelmsford | 2024 | tt13700 |
| 86 runs | by Surrey | Lord's Cricket Ground, St John's Wood | 2013 | tt3749 |
| 79 runs | by Somerset | County Ground, Taunton | 2010 | tt1829 |
| 77 runs | by Kent | Lord's Cricket Ground, St John's Wood | 2021 | tt9830 |
| 73 runs | by Surrey | Lord's Cricket Ground, St John's Wood | 2023 | tt12197 |
| 70 runs | by Gloucestershire | Brightside Ground, Bristol | 2018 | tt7109 |
| 62 runs | by Kent | Lord's Cricket Ground, St John's Wood | 2009 | tt1236 |
| 61 runs | by Essex | The Cloud County Ground, Chelmsford | 2022 | tt10951 |
| 59 runs | by Hampshire | The Rose Bowl, Southampton | 2006 | tt376 |
| 58 runs | by Stanford Super Stars | Stanford Cricket Ground, Coolidge | 2008/09 | tt1044 |
| 57 runs | by Surrey | Lord's Cricket Ground, St John's Wood | 2009 | tt1217 |
| 56 runs | by Hampshire | Uxbridge Cricket Club Ground, Uxbridge | 2009 | tt1267 |
| 56 runs | by Surrey | Lord's Cricket Ground, St John's Wood | 2024 | tt13831 |
| 55 runs | by Kent | Spitfire Ground, St Lawrence, Canterbury | 2022 | tt10908 |
| 55 runs | by Kent | Spitfire Ground, St Lawrence, Canterbury | 2023 | tt12389 |
| 54 runs | by Surrey | Lord's Cricket Ground, St John's Wood | 2021 | tt9628 |
| 52 runs | by Kent | The Kent County Cricket Ground, Beckenham | 2006 | tt397 |
