| 144 runs | by Warwickshire | Edgbaston, Birmingham | 2022 | tt11031 |
| 104 runs | by Yorkshire | Headingley, Leeds | 2010 | tt1790 |
| 96 runs | by Lancashire | Emirates Old Trafford, Manchester | 2016 | tt5778 |
| 94 runs | by Yorkshire | County Ground, New Road, Worcester | 2021 | tt9687 |
| 73 runs | by Northamptonshire | County Ground, Northampton | 2022 | tt10941 |
| 67 runs | by Somerset | County Ground, Taunton | 2008 | tt966 |
| 61 runs | by Gloucestershire | Chester Road North, Kidderminster | 2007 | tt681 |
| 58 runs | by Glamorgan | County Ground, New Road, Worcester | 2013 | tt3660 |
| 56 runs | by Glamorgan | Sophia Gardens, Cardiff | 2003 | tt33 |
| 53 runs | by Warwickshire | Edgbaston, Birmingham | 2023 | tt12393 |
| 50 runs | by Lancashire | County Ground, New Road, Worcester | 2014 | tt4428 |