Team Highest Innings Totals - Glamorgan
Highest totals For County Championship Division One - Glamorgan
Highest totals
Team | Score | Overs | RR | Inns | Opposition | Ground | Result | Match Date | Scorecard |
| 584/3d | 133.0 | 4.39 | 1 | v Middlesex | Southgate | lost | 15 Jun 2005 | First-class | |
| 382 | 114.2 | 3.34 | 1 | v Gloucs | Bristol | won | 25 Aug 2005 | First-class | |
| 358 | 98.4 | 3.62 | 2 | v Kent | Cardiff | lost | 8 Jun 2005 | First-class | |
| 354/3 | 80.0 | 4.42 | 3 | v Sussex | Swansea | draw | 1 Jun 2005 | First-class | |
| 345 | 74.5 | 4.61 | 2 | v Surrey | The Oval | lost | 11 May 2005 | First-class | |
| 345 | 107.1 | 3.21 | 3 | v Gloucs | Cardiff | lost | 6 May 2005 | First-class | |
| 323 | 82.0 | 3.93 | 3 | v Warwickshire | Birmingham | lost | 13 Apr 2005 | First-class | |
| 308 | 88.1 | 3.49 | 3 | v Warwickshire | Colwyn Bay | lost | 10 Aug 2005 | First-class | |
| 307 | 90.4 | 3.38 | 3 | v Notts | Cardiff | lost | 30 Aug 2005 | First-class | |
| 306 | 95.5 | 3.19 | 2 | v Kent | Canterbury | lost | 3 Aug 2005 | First-class | |
| 301 | 61.0 | 4.93 | 2 | v Sussex | Swansea | draw | 1 Jun 2005 | First-class | |
| 290 | 95.0 | 3.05 | 3 | v Gloucs | Bristol | won | 25 Aug 2005 | First-class | |
| 279 | 88.0 | 3.17 | 3 | v Middlesex | Cardiff | lost | 21 Jul 2005 | First-class | |
| 267 | 61.0 | 4.37 | 1 | v Notts | Nottingham | lost | 8 Jul 2005 | First-class | |
| 260 | 45.4 | 5.69 | 3 | v Kent | Cardiff | lost | 8 Jun 2005 | First-class | |
| 256/3d | 52.0 | 4.92 | 3 | v Middlesex | Southgate | lost | 15 Jun 2005 | First-class | |
| 255 | 77.3 | 3.29 | 1 | v Sussex | Hove | lost | 7 Sep 2005 | First-class | |
| 250 | 64.1 | 3.89 | 1 | v Surrey | Cardiff | lost | 27 Apr 2005 | First-class | |
| 250 | 84.4 | 2.95 | 3 | v Hampshire | Southampton | lost | 20 May 2005 | First-class | |
| 249 | 81.0 | 3.07 | 2 | v Hampshire | Cardiff | lost | 15 Sep 2005 | First-class | |
| 248 | 55.1 | 4.49 | 4 | v Surrey | The Oval | lost | 11 May 2005 | First-class | |
| 244 | 62.4 | 3.89 | 4 | v Hampshire | Cardiff | lost | 15 Sep 2005 | First-class | |
| 239 | 58.1 | 4.10 | 1 | v Warwickshire | Colwyn Bay | lost | 10 Aug 2005 | First-class | |
| 239 | 66.0 | 3.62 | 2 | v Gloucs | Cardiff | lost | 6 May 2005 | First-class | |
| 232 | 56.3 | 4.10 | 2 | v Middlesex | Cardiff | lost | 21 Jul 2005 | First-class | |
| 229 | 68.2 | 3.35 | 2 | v Hampshire | Southampton | lost | 20 May 2005 | First-class | |
| 214 | 78.3 | 2.72 | 3 | v Notts | Nottingham | lost | 8 Jul 2005 | First-class | |
| 198 | 63.3 | 3.11 | 1 | v Warwickshire | Birmingham | lost | 13 Apr 2005 | First-class | |
| 173 | 46.4 | 3.70 | 3 | v Surrey | Cardiff | lost | 27 Apr 2005 | First-class | |
| 157 | 52.0 | 3.01 | 3 | v Kent | Canterbury | lost | 3 Aug 2005 | First-class | |
| 151 | 48.0 | 3.14 | 1 | v Notts | Cardiff | lost | 30 Aug 2005 | First-class | |
| 96 | 28.0 | 3.42 | 3 | v Sussex | Hove | lost | 7 Sep 2005 | First-class |
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