Smallest victories by Guernsey in T20Is
By runs
Winner | Margin | Target | Overs | Opposition | Ground | Match Date | Scorecard |
| 6 runs | 119 | 20.0 | v Denmark | Castel | 20 Jun 2019 | T20I # 804 | |
| 10 runs | 173 | 20.0 | v Germany | Deventer | 15 Aug 2023 | T20I # 2197 | |
| 13 runs | 53 | 10.0 | v Jersey | St Saviour | 6 Jun 2025 | T20I # 3204 | |
| 17 runs | 132 | 20.0 | v Luxembourg | Kerava | 25 Jul 2022 | T20I # 1687 | |
| 52 runs | 131 | 18.0 | v Bulgaria | Vantaa | 24 Jul 2022 | T20I # 1682 | |
| 56 runs | 154 | 19.0 | v France | Kerava | 31 Jul 2022 | T20I # 1712 |
By wickets
Winner | Margin | Target | Overs | Opposition | Ground | Match Date | Scorecard |
| 4 wickets | 96 | 15.5 | v Norway | Castel | 19 Jun 2019 | T20I # 801 | |
| 4 wickets | 149 | 19.1 | v Jersey | Port Soif | 23 Jun 2024 | T20I # 2718 | |
| 5 wickets | 165 | 20.0 | v Germany | Deventer | 14 Aug 2023 | T20I # 2196 | |
| 5 wickets | 100 | 12.1 | v Estonia | Castel | 25 Aug 2024 | T20I # 2809 | |
| 6 wickets | 155 | 18.1 | v Belgium | Waterloo | 8 Jun 2024 | T20I # 2647 | |
| 6 wickets | 159 | 18.4 | v Denmark | Castel | 28 Aug 2024 | T20I # 2825 | |
| 7 wickets | 126 | 15.3 | v Belgium | Waterloo | 9 Jun 2024 | T20I # 2657 | |
| 7 wickets | 123 | 18.2 | v Switzerland | Castel | 31 Aug 2025 | T20I # 3429 | |
| 8 wickets | 101 | 11.3 | v Isle of Man | St Peter Port | 21 Aug 2020 | T20I # 1085 | |
| 8 wickets | 121 | 18.0 | v Norway | Almeria | 30 Apr 2022 | T20I # 1515 | |
| 8 wickets | 108 | 18.0 | v Spain | Almeria | 1 May 2022 | T20I # 1517 | |
| 8 wickets | 98 | 9.4 | v Bulgaria | Port Soif | 21 Aug 2024 | T20I # 2785 | |
| 8 wickets | 140 | 13.5 | v Malta | Castel | 22 Aug 2024 | T20I # 2791 | |
| 9 wickets | 56 | 5.3 | v Slovenia | Kerava | 28 Jul 2022 | T20I # 1697 |
By balls remaining in the second innings
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 5 wickets | 0 | 165 | 20.0 | 20.0 | v Germany | Deventer | 14 Aug 2023 | T20I # 2196 | |
| 4 wickets | 1 | 96 | 15.5 | 16.0 | v Norway | Castel | 19 Jun 2019 | T20I # 801 | |
| 4 wickets | 5 | 149 | 19.1 | 20.0 | v Jersey | Port Soif | 23 Jun 2024 | T20I # 2718 | |
| 6 wickets | 8 | 159 | 18.4 | 20.0 | v Denmark | Castel | 28 Aug 2024 | T20I # 2825 | |
| 7 wickets | 10 | 123 | 18.2 | 20.0 | v Switzerland | Castel | 31 Aug 2025 | T20I # 3429 | |
| 6 wickets | 11 | 155 | 18.1 | 20.0 | v Belgium | Waterloo | 8 Jun 2024 | T20I # 2647 | |
| 8 wickets | 12 | 121 | 18.0 | 20.0 | v Norway | Almeria | 30 Apr 2022 | T20I # 1515 | |
| 8 wickets | 12 | 108 | 18.0 | 20.0 | v Spain | Almeria | 1 May 2022 | T20I # 1517 | |
| 7 wickets | 27 | 126 | 15.3 | 20.0 | v Belgium | Waterloo | 9 Jun 2024 | T20I # 2657 | |
| 8 wickets | 37 | 140 | 13.5 | 20.0 | v Malta | Castel | 22 Aug 2024 | T20I # 2791 | |
| 5 wickets | 47 | 100 | 12.1 | 20.0 | v Estonia | Castel | 25 Aug 2024 | T20I # 2809 | |
| 8 wickets | 51 | 101 | 11.3 | 20.0 | v Isle of Man | St Peter Port | 21 Aug 2020 | T20I # 1085 | |
| 8 wickets | 62 | 98 | 9.4 | 20.0 | v Bulgaria | Port Soif | 21 Aug 2024 | T20I # 2785 | |
| 9 wickets | 87 | 56 | 5.3 | 20.0 | v Slovenia | Kerava | 28 Jul 2022 | T20I # 1697 |
Tied matches
Team 1 | Team 2 | Ground | Match Date | Scorecard |
| Guernsey | Jersey | College Field, St Peter Port | 31 May 2019 | T20I # 788 |
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