Largest margins in T20s by Innings, runs & wickets for Somerset vs Surrey
By runs
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 67 runs | 0 | 202 | 19.3 | 20.0 | v Somerset | The Oval | 13 Jul 2025 | Twenty20 | |
| 57 runs | 0 | 164 | 15.4 | 20.0 | v Somerset | The Oval | 2 Jun 2024 | Twenty20 | |
| 47 runs | 0 | 219 | 18.1 | 20.0 | v Surrey | Taunton | 3 Jul 2022 | Twenty20 | |
| 39 runs | 0 | 172 | 20.0 | 20.0 | v Somerset | The Oval | 2 Jul 2010 | Twenty20 | |
| 38 runs | 0 | 170 | 20.0 | 20.0 | v Surrey | The Oval | 30 Jun 2011 | Twenty20 | |
| 38 runs | 0 | 209 | 20.0 | 20.0 | v Somerset | The Oval | 17 Jul 2015 | Twenty20 | |
| 28 runs | 0 | 196 | 20.0 | 20.0 | v Somerset | Taunton | 16 Jun 2023 | Twenty20 | |
| 24 runs | 0 | 143 | 16.5 | 19.0 | v Surrey | Birmingham | 15 Jul 2023 | Twenty20 | |
| 21 runs | 0 | 161 | 20.0 | 20.0 | v Somerset | Taunton | 12 Jun 2010 | Twenty20 | |
| 18 runs | 0 | 209 | 20.0 | 20.0 | v Surrey | The Oval | 30 Jun 2023 | Twenty20 | |
| 15 runs | 0 | 155 | 20.0 | 20.0 | v Somerset | The Oval | 8 Jul 2016 | Twenty20 | |
| 14 runs | 0 | 174 | 20.0 | 20.0 | v Somerset | Taunton | 18 May 2014 | Twenty20 | |
| 4 runs | 0 | 182 | 20.0 | 20.0 | v Somerset | The Oval | 9 Jul 2017 | Twenty20 |
By wickets
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 9 wickets | 20 | 100 | 6.4 | 10.0 | v Somerset | The Oval | 27 Jul 2018 | Twenty20 | |
| 7 wickets | 24 | 188 | 16.0 | 20.0 | v Somerset | Taunton | 11 Jun 2021 | Twenty20 | |
| 6 wickets | 21 | 158 | 16.3 | 20.0 | v Somerset | The Oval | 27 Aug 2019 | Twenty20 | |
| 5 wickets | 13 | 147 | 17.5 | 20.0 | v Surrey | Taunton | 30 May 2025 | Twenty20 | |
| 4 wickets | 10 | 158 | 18.2 | 20.0 | v Surrey | Taunton | 6 Aug 2017 | Twenty20 |
By balls remaining in the second innings
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 7 wickets | 24 | 188 | 16.0 | 20.0 | v Somerset | Taunton | 11 Jun 2021 | Twenty20 | |
| 6 wickets | 21 | 158 | 16.3 | 20.0 | v Somerset | The Oval | 27 Aug 2019 | Twenty20 | |
| 9 wickets | 20 | 100 | 6.4 | 10.0 | v Somerset | The Oval | 27 Jul 2018 | Twenty20 | |
| 5 wickets | 13 | 147 | 17.5 | 20.0 | v Surrey | Taunton | 30 May 2025 | Twenty20 | |
| 4 wickets | 10 | 158 | 18.2 | 20.0 | v Surrey | Taunton | 6 Aug 2017 | Twenty20 | |
| 8 wickets | 8 | 204 | 18.4 | 20.0 | v Surrey | Taunton | 2 Aug 2019 | Twenty20 | |
| 7 wickets | 8 | 147 | 18.4 | 20.0 | v Surrey | The Oval | 23 Jun 2021 | Twenty20 | |
| 6 wickets | 8 | 154 | 18.4 | 20.0 | v Surrey | Birmingham | 14 Sep 2024 | Twenty20 | |
| 3 wickets | 6 | 149 | 19.0 | 20.0 | v Somerset | The Oval | 6 Aug 2013 | Twenty20 | |
| 6 wickets | 6 | 183 | 19.0 | 20.0 | v Surrey | Taunton | 12 Jul 2024 | Twenty20 | |
| 3 wickets | 5 | 137 | 19.1 | 20.0 | v Somerset | The Oval | 16 Jul 2014 | Twenty20 | |
| 4 wickets | 5 | 177 | 19.1 | 20.0 | v Surrey | Taunton | 10 Aug 2018 | Twenty20 | |
| 6 wickets | 4 | 187 | 19.2 | 20.0 | v Surrey | Taunton | 10 Jun 2016 | Twenty20 | |
| 3 wickets | 0 | 145 | 20.0 | 20.0 | v Somerset | The Oval | 21 Jun 2022 | Twenty20 |
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