Largest margins by Innings, runs & wickets for Cricket Australia Second XI Twenty20
By runs
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 108 runs | 0 | 195 | 16.3 | 20.0 | v VIC 2nd XI | Buderim | 22 Jan 2020 | Other T20 | |
| 83 runs | 0 | 206 | 17.2 | 20.0 | v ACT 2nd XI | Adelaide | 21 Jan 2020 | Other T20 | |
| 76 runs | 0 | 190 | 18.0 | 20.0 | v ACT 2nd XI | Adelaide | 22 Jan 2020 | Other T20 | |
| 39 runs | 0 | 37 | 5.4 | 5.4 | v VIC 2nd XI | Buderim | 21 Jan 2020 | Other T20 | |
| 37 runs | 0 | 155 | 17.0 | 17.0 | v WA 2nd XI | Adelaide | 20 Jan 2020 | Other T20 | |
| 33 runs | 0 | 177 | 19.0 | 20.0 | v VIC 2nd XI | Buderim | 21 Jan 2020 | Other T20 | |
| 24 runs | 0 | 178 | 20.0 | 20.0 | v VIC 2nd XI | Buderim | 20 Jan 2020 | Other T20 | |
| 22 runs | 0 | 163 | 17.3 | 20.0 | v ACT 2nd XI | Adelaide | 22 Jan 2020 | Other T20 | |
| 19 runs | 0 | 176 | 20.0 | 20.0 | v SAust 2nd XI | Adelaide | 21 Jan 2020 | Other T20 | |
| 14 runs | 0 | 175 | 20.0 | 20.0 | v ACT 2nd XI | Adelaide | 23 Jan 2020 | Other T20 | |
| 7 runs | 0 | 187 | 20.0 | 20.0 | v SAust 2nd XI | Adelaide | 21 Jan 2020 | Other T20 | |
| 3 runs | 0 | 52 | 8.4 | 8.4 | v NSW 2nd XI | Buderim | 21 Jan 2020 | Other T20 | |
| 2 runs | 0 | 158 | 20.0 | 20.0 | v SAust 2nd XI | Adelaide | 23 Jan 2020 | Other T20 |
By wickets
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 8 wickets | 16 | 142 | 17.2 | 20.0 | v VIC 2nd XI | Buderim | 22 Jan 2020 | Other T20 | |
| 4 wickets | 11 | 173 | 18.1 | 20.0 | v Tas 2nd XI | Buderim | 22 Jan 2020 | Other T20 | |
| 4 wickets | 12 | 121 | 18.0 | 20.0 | v Tas 2nd XI | Buderim | 22 Jan 2020 | Other T20 |
By balls remaining in the second innings
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 8 wickets | 16 | 142 | 17.2 | 20.0 | v VIC 2nd XI | Buderim | 22 Jan 2020 | Other T20 | |
| 4 wickets | 12 | 121 | 18.0 | 20.0 | v Tas 2nd XI | Buderim | 22 Jan 2020 | Other T20 | |
| 4 wickets | 11 | 173 | 18.1 | 20.0 | v Tas 2nd XI | Buderim | 22 Jan 2020 | Other T20 | |
| 6 wickets | 7 | 155 | 18.5 | 20.0 | v ACT 2nd XI | Adelaide | 20 Jan 2020 | Other T20 | |
| 8 wickets | 6 | 106 | 14.0 | 15.0 | v QLD 2nd XI | Buderim | 20 Jan 2020 | Other T20 | |
| 2 wickets | 6 | 116 | 19.0 | 20.0 | v QLD 2nd XI | Buderim | 21 Jan 2020 | Other T20 |
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