Highest totals for Middlesex vs Somerset in T20s
Highest totals
Team | Score | Overs | RR | Inns | Opposition | Ground | Result | Match Date | Scorecard |
| 235/5 | 19.2 | 12.15 | 2 | v Middlesex | Taunton | won | 12 Jun 2025 | Twenty20 | |
| 235/5 | 20.0 | 11.75 | 1 | v Middlesex | Taunton | won | 5 Jun 2011 | Twenty20 | |
| 229/6 | 20.0 | 11.45 | 1 | v Middlesex | Taunton | won | 29 Jul 2018 | Twenty20 | |
| 229/5 | 20.0 | 11.45 | 1 | v Somerset | Taunton | lost | 12 Jun 2025 | Twenty20 | |
| 227/4 | 17.0 | 13.35 | 2 | v Somerset | Taunton | won | 30 Aug 2019 | Twenty20 | |
| 226/5 | 20.0 | 11.30 | 1 | v Middlesex | Taunton | lost | 30 Aug 2019 | Twenty20 | |
| 215/4 | 20.0 | 10.75 | 1 | v Somerset | Richmond | won | 4 Aug 2019 | Twenty20 | |
| 207/9 | 20.0 | 10.35 | 1 | v Middlesex | Uxbridge | won | 16 Jul 2017 | Twenty20 | |
| 204/5 | 20.0 | 10.20 | 1 | v Middlesex | Taunton | won | 4 Jul 2010 | Twenty20 | |
| 195/9 | 20.0 | 9.75 | 2 | v Somerset | Taunton | lost | 5 Jun 2011 | Twenty20 | |
| 186/7 | 20.0 | 9.30 | 2 | v Somerset | Uxbridge | lost | 16 Jul 2017 | Twenty20 | |
| 183/3 | 20.0 | 9.15 | 1 | v Middlesex | Taunton | won | 25 Jul 2014 | Twenty20 | |
| 180 | 17.2 | 10.38 | 2 | v Middlesex | Richmond | lost | 4 Aug 2019 | Twenty20 | |
| 178/6 | 18.0 | 9.88 | 2 | v Middlesex | Lord's | won | 19 Jul 2018 | Twenty20 | |
| 177/1 | 18.0 | 9.83 | 2 | v Middlesex | Uxbridge | won | 26 Jun 2015 | Twenty20 | |
| 175/5 | 20.0 | 8.75 | 1 | v Somerset | Lord's | lost | 19 Jul 2018 | Twenty20 | |
| 174/6 | 18.0 | 9.66 | 2 | v Somerset | Taunton | lost | 29 Jul 2018 | Twenty20 | |
| 171/7 | 20.0 | 8.55 | 1 | v Somerset | Uxbridge | lost | 26 Jun 2015 | Twenty20 | |
| 166/5 | 15.5 | 10.48 | 2 | v Middlesex | Taunton | won | 23 Jul 2017 | Twenty20 | |
| 162/6 | 16.0 | 10.12 | 1 | v Somerset | Taunton | lost | 23 Jul 2017 | Twenty20 | |
| 161/8 | 19.4 | 8.18 | 2 | v Middlesex | Lord's | won | 1 Jul 2022 | Twenty20 | |
| 161/7 | 20.0 | 8.05 | 2 | v Somerset | Taunton | lost | 25 Jul 2014 | Twenty20 | |
| 160/6 | 20.0 | 8.00 | 1 | v Somerset | Lord's | lost | 1 Jul 2022 | Twenty20 | |
| 158/5 | 17.5 | 8.85 | 2 | v Middlesex | Lord's | won | 9 Jun 2010 | Twenty20 | |
| 155/2 | 17.1 | 9.02 | 2 | v Somerset | The Oval | won | 18 Jun 2014 | Twenty20 | |
| 155/6 | 20.0 | 7.75 | 1 | v Somerset | Lord's | lost | 9 Jun 2010 | Twenty20 | |
| 152 | 18.1 | 8.36 | 1 | v Middlesex | Taunton | won | 2 Jul 2021 | Twenty20 | |
| 152/4 | 20.0 | 7.60 | 1 | v Middlesex | The Oval | lost | 18 Jun 2014 | Twenty20 | |
| 143/7 | 20.0 | 7.15 | 2 | v Somerset | Southgate | tied | 10 Jul 2011 | Twenty20 | |
| 143/6 | 20.0 | 7.15 | 1 | v Middlesex | Southgate | tied | 10 Jul 2011 | Twenty20 | |
| 142/1 | 13.3 | 10.51 | 2 | v Middlesex | Taunton | won | 2 Jun 2023 | Twenty20 | |
| 141/5 | 19.1 | 7.35 | 2 | v Somerset | Taunton | won | 15 Jul 2016 | Twenty20 | |
| 137 | 19.3 | 7.02 | 1 | v Middlesex | Taunton | lost | 15 Jul 2016 | Twenty20 | |
| 136 | 18.4 | 7.28 | 1 | v Somerset | Taunton | lost | 2 Jun 2023 | Twenty20 | |
| 125 | 17.4 | 7.07 | 2 | v Somerset | Taunton | lost | 4 Jul 2010 | Twenty20 | |
| 114/6 | 16.0 | 7.12 | 2 | v Somerset | Taunton | lost | 2 Jul 2021 | Twenty20 | |
| 92/3 | 9.0 | 10.22 | 1 | v Somerset | Lord's | won | 23 Jun 2016 | Twenty20 | |
| 88/6 | 9.0 | 9.77 | 2 | v Middlesex | Lord's | lost | 23 Jun 2016 | Twenty20 | |
| 82/1 | 12.3 | 6.56 | 2 | v Middlesex | Lord's | won | 11 Jun 2024 | Twenty20 | |
| 78 | 16.3 | 4.72 | 1 | v Somerset | Lord's | lost | 11 Jun 2024 | Twenty20 |
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