| Team | Score | Overs | RR | Inns | Ground | Match Date | Scorecard | |
|---|---|---|---|---|---|---|---|---|
| Sussex | 239/5 | 20.0 | 11.95 | 1 | Hove | 23 Jun 2010 | T20 | |
| Worcs | 223/9 | 20.0 | 11.15 | 1 | Worcester | 6 Jul 2005 | T20 | |
| Worcs | 222/4 | 20.0 | 11.10 | 1 | Worcester | 24 Jun 2009 | T20 | |
| Gloucs | 221/7 | 20.0 | 11.05 | 1 | Bristol | 24 Jun 2003 | T20 | |
| Somerset | 219/5 | 20.0 | 10.95 | 1 | Taunton | 11 Jul 2006 | T20 | |
| Essex | 219/4 | 20.0 | 10.95 | 1 | Chelmsford | 16 Jul 2017 | T20 | |
| Surrey | 215 | 19.3 | 11.02 | 2 | The Oval | 15 May 2015 | T20 | |
| Middlesex | 213/4 | 20.0 | 10.65 | 1 | Richmond | 15 Jun 2010 | T20 | |
| Somerset | 212/3 | 20.0 | 10.60 | 1 | Taunton | 27 Jun 2005 | T20 | |
| Northants | 207/4 | 20.0 | 10.35 | 1 | Northampton | 22 Jun 2008 | T20 | |
| Gloucs | 207/3 | 20.0 | 10.35 | 1 | Bristol | 8 Jun 2014 | T20 | |
| Warwickshire | 205/7 | 20.0 | 10.25 | 1 | Swansea | 25 Jun 2005 | T20 | |
| Somerset | 202/6 | 20.0 | 10.10 | 1 | Taunton | 29 Jun 2007 | T20 | |
| Hampshire | 199/5 | 20.0 | 9.95 | 1 | Southampton | 1 Jul 2010 | T20 | |
| Somerset | 199/6 | 20.0 | 9.95 | 1 | Taunton | 19 Jul 2013 | T20 | |
| Somerset | 197/3 | 18.0 | 10.94 | 2 | Cardiff | 18 Jun 2003 | T20 | |
| Essex | 195/6 | 19.4 | 9.91 | 2 | Chelmsford | 23 May 2014 | T20 | |
| Northants | 195/3 | 20.0 | 9.75 | 1 | Northampton | 29 May 2009 | T20 | |
| Somerset | 193/8 | 20.0 | 9.65 | 1 | Taunton | 5 Jul 2004 | T20 | |
| Gloucs | 191/5 | 19.3 | 9.79 | 2 | Cardiff | 10 Jul 2006 | T20 | |
| Essex | 191/6 | 20.0 | 9.55 | 1 | Chelmsford | 11 Jun 2010 | T20 | |
| Surrey | 188/4 | 20.0 | 9.40 | 2 | The Oval | 11 Jul 2014 | T20 | |
| Essex | 187/7 | 20.0 | 9.35 | 1 | Chelmsford | 19 Jun 2015 | T20 | |
| Somerset | 185/3 | 20.0 | 9.25 | 1 | Cardiff | 30 Jun 2006 | T20 | |
| Somerset | 185/6 | 20.0 | 9.25 | 1 | Taunton | 17 Jun 2008 | T20 | |
| Middlesex | 184/3 | 20.0 | 9.20 | 1 | Richmond | 3 Jul 2014 | T20 | |
| Somerset | 183 | 18.4 | 9.80 | 1 | Cardiff | 22 Jun 2005 | T20 | |
| Somerset | 182/6 | 19.5 | 9.17 | 2 | Taunton | 22 Jun 2012 | T20 | |
| Somerset | 182/6 | 20.0 | 9.10 | 2 | Taunton | 13 Aug 2017 | T20 | |
| Warwickshire | 181/9 | 20.0 | 9.05 | 1 | Birmingham | 20 Jun 2003 | T20 | |
| Yorkshire | 180/8 | 20.0 | 9.00 | 1 | Cardiff | 11 Aug 2016 | T20 | |
| Sussex | 180/6 | 20.0 | 9.00 | 2 | Arundel | 9 Jul 2017 | T20 | |
| Sussex | 178/7 | 20.0 | 8.90 | 1 | Cardiff | 30 May 2014 | T20 | |
| Kent | 178/8 | 20.0 | 8.90 | 2 | Tunbridge Wells | 17 Jul 2015 | T20 | |
| Kent | 177/9 | 20.0 | 8.85 | 2 | Cardiff | 13 Jun 2014 | T20 | |
| Surrey | 175/7 | 20.0 | 8.75 | 2 | The Oval | 4 Aug 2017 | T20 | |
| Warwickshire | 175/9 | 20.0 | 8.75 | 1 | Birmingham | 2 Sep 2017 | T20 | |
| Northants | 174/6 | 20.0 | 8.70 | 1 | Northampton | 7 Jul 2006 | T20 | |
| Kent | 174/4 | 20.0 | 8.70 | 2 | Canterbury | 30 Jul 2017 | T20 | |
| Warwickshire | 173/5 | 20.0 | 8.65 | 1 | Birmingham | 24 Jun 2007 | T20 | |
| Somerset | 172/3 | 15.4 | 10.97 | 2 | Taunton | 26 Jun 2011 | T20 | |
| Gloucs | 172/6 | 20.0 | 8.60 | 2 | Bristol | 12 Jun 2015 | T20 | |
| Warwickshire | 170/9 | 20.0 | 8.50 | 1 | Birmingham | 28 Jun 2006 | T20 | |
| Hampshire | 170/6 | 20.0 | 8.50 | 1 | Cardiff | 25 Jun 2014 | T20 | |
| Warwickshire | 169/9 | 20.0 | 8.45 | 1 | Birmingham | 30 Jun 2005 | T20 | |
| Surrey | 169/4 | 20.0 | 8.45 | 1 | Cardiff | 1 Jul 2011 | T20 | |
| Somerset | 169/4 | 20.0 | 8.45 | 2 | Taunton | 6 Jun 2014 | T20 | |
| Surrey | 168/4 | 20.0 | 8.40 | 1 | The Oval | 4 Jul 2010 | T20 | |
| Gloucs | 168/8 | 20.0 | 8.40 | 1 | Bristol | 10 Jun 2016 | T20 |
| By default, the shading indicates records from the past week, or failing that, the most recent entry. |
| Adjust: most recent | past week | past month | past 6 months | past year | 4 years | 10 years |
| Records includes the following current or recent matches: |
|
Warwickshire v Glamorgan at Birmingham, NatWest t20 Blast 1st semi final, Sep 2, 2017
[Twenty20] |
|
Glamorgan v Leicestershire at Cardiff, NatWest t20 Blast 2nd quarter final, Aug 23, 2017
[Twenty20] |
|
Glamorgan v Middlesex at Cardiff, NatWest t20 Blast, Aug 18, 2017
[Twenty20] |