Smallest victories For Sri Lanka Domestic T20 - Sinhalese Sports Club
By runs
Winner | Margin | Balls Rem | Target | Overs | Opposition | Ground | Match Date | Scorecard |
| 7 runs | 0 | 47 | 6.5 | v Chilaw CC | Moratuwa | 5 Nov 2005 | Twenty20 | |
| 9 runs | 0 | 131 | 20.0 | v Saracens | Colombo (CCC) | 4 Jan 2020 | Twenty20 | |
| 19 runs | 0 | 174 | 19.0 | v Tamil Union | Colombo (Burgher) | 5 Nov 2005 | Twenty20 | |
| 27 runs | 0 | 149 | 19.2 | v KTC | Colombo (Colts) | 4 Mar 2021 | Twenty20 | |
| 29 runs | 0 | 147 | 19.2 | v SL Army | Colombo (SSC) | 20 Mar 2021 | Twenty20 | |
| 31 runs | 0 | 158 | 20.0 | v Moors | Colombo (NCC) | 22 Dec 2015 | Twenty20 | |
| 32 runs | 0 | 160 | 19.3 | v Colombo CC | Colombo (NCC) | 18 Mar 2021 | Twenty20 | |
| 64 runs | 0 | 247 | 19.2 | v Colombo CC | Colombo (Colts) | 4 Apr 2015 | Twenty20 | |
| 66 runs | 0 | 221 | 20.0 | v Galle CC | Colombo (PSS) | 5 Jan 2016 | Twenty20 | |
| 76 runs | 0 | 178 | 20.0 | v Badureliya | Colombo (CCC) | 29 Oct 2005 | Twenty20 | |
| 107 runs | 0 | 204 | 18.3 | v SL Navy | Colombo (Burgher) | 27 Feb 2018 | Twenty20 | |
| 123 runs | 0 | 252 | 16.2 | v Saracens | Colombo (Colts) | 12 Jan 2016 | Twenty20 |
By wickets
By balls remaining in the second innings
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 3 wickets | 1 | 159 | 19.5 | 20.0 | v Nondescripts | Colombo (PSS) | 20 Jan 2016 | Twenty20 | |
| 7 wickets | 3 | 157 | 19.3 | 20.0 | v Moors | Katunayake | 7 Mar 2021 | Twenty20 | |
| 2 wickets | 4 | 186 | 19.2 | 20.0 | v Ragama CC | Colombo (RPS) | 13 Jan 2016 | Twenty20 | |
| 1 wicket | 10 | 111 | 18.2 | 20.0 | v Moors | Colombo (RPS) | 29 Mar 2012 | Twenty20 | |
| 7 wickets | 14 | 125 | 17.4 | 20.0 | v Chilaw CC | Colombo (Colts) | 12 Mar 2021 | Twenty20 | |
| 6 wickets | 16 | 118 | 17.2 | 20.0 | v Colts CC | Colombo (CCC) | 16 Mar 2021 | Twenty20 | |
| 6 wickets | 18 | 188 | 17.0 | 20.0 | v Badureliya | Colombo (SSC) | 2 Apr 2015 | Twenty20 | |
| 8 wickets | 21 | 122 | 16.3 | 20.0 | v Tamil Union | Colombo (Colts) | 6 Jan 2020 | Twenty20 | |
| 7 wickets | 22 | 107 | 16.2 | 20.0 | v SL Navy | Colombo (Burgher) | 10 Jan 2020 | Twenty20 | |
| 7 wickets | 30 | 131 | 15.0 | 20.0 | v Nondescripts | Katunayake | 18 Feb 2019 | Twenty20 | |
| 7 wickets | 31 | 128 | 14.5 | 20.0 | v Kurunegala | Colombo (Colts) | 9 Mar 2021 | Twenty20 | |
| 8 wickets | 39 | 119 | 13.3 | 20.0 | v Colts CC | Colombo (SSC) | 9 Apr 2015 | Twenty20 | |
| 9 wickets | 42 | 118 | 13.0 | 20.0 | v Colombo CC | Colombo (Bloomfield) | 16 Oct 2005 | Twenty20 | |
| 7 wickets | 46 | 145 | 12.2 | 20.0 | v SL Army | Colombo (SSC) | 6 Apr 2015 | Twenty20 | |
| 6 wickets | 46 | 73 | 12.2 | 20.0 | v Kurunegala | Colombo (Police) | 1 Mar 2018 | Twenty20 | |
| 9 wickets | 58 | 60 | 10.2 | 20.0 | v SL Army | Colombo (CCC) | 2 Mar 2007 | Twenty20 | |
| 7 wickets | 58 | 73 | 10.2 | 20.0 | v SLPACC | Colombo (RPS) | 28 Mar 2012 | Twenty20 | |
| 10 wickets | 65 | 118 | 9.1 | 20.0 | v Police SC | Colombo | 30 Mar 2012 | Twenty20 |
Tied matches
Team 1 | Team 2 | Ground | Match Date | Scorecard |
| Saracens | Sinhalese | Bloomfield Cricket and Athletic Club Ground, Colombo | 15 Feb 2019 | Twenty20 |
| Sinhalese | Police SC | Burgher Recreation Club Ground, Colombo | 12 Jan 2020 | Twenty20 |
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