Highest totals For County Championship Division One, 2012 - Middlesex
Highest totals
Team | Score | Overs | RR | Inns | Opposition | Ground | Result | Match Date | Scorecard |
| 491 | 140.3 | 3.49 | 2 | v Sussex | Lord's | won | 30 May 2012 | First-class | |
| 446 | 112.5 | 3.95 | 1 | v Lancashire | Lord's | won | 4 Sep 2012 | First-class | |
| 412 | 91.0 | 4.52 | 3 | v Warwickshire | Birmingham | draw | 21 Aug 2012 | First-class | |
| 402 | 115.4 | 3.47 | 1 | v Warwickshire | Uxbridge | draw | 1 Aug 2012 | First-class | |
| 364/3d | 86.5 | 4.19 | 2 | v Somerset | Lord's | draw | 5 Jun 2012 | First-class | |
| 327/7d | 86.0 | 3.80 | 1 | v Worcs | Lord's | won | 3 May 2012 | First-class | |
| 306 | 90.1 | 3.39 | 2 | v Worcs | Worcester | won | 28 Aug 2012 | First-class | |
| 305/9d | 94.0 | 3.24 | 3 | v Lancashire | Lord's | won | 4 Sep 2012 | First-class | |
| 300/9d | 105.1 | 2.85 | 2 | v Notts | Nottingham | draw | 9 May 2012 | First-class | |
| 287 | 71.2 | 4.02 | 1 | v Warwickshire | Birmingham | draw | 21 Aug 2012 | First-class | |
| 265/1 | 96.0 | 2.76 | 4 | v Lancashire | Liverpool | draw | 23 May 2012 | First-class | |
| 256 | 93.3 | 2.73 | 1 | v Surrey | Lord's | won | 12 Apr 2012 | First-class | |
| 246 | 68.4 | 3.58 | 1 | v Somerset | Taunton | lost | 5 Apr 2012 | First-class | |
| 245 | 99.3 | 2.46 | 4 | v Surrey | The Oval | lost | 15 Aug 2012 | First-class | |
| 239/2 | 70.0 | 3.41 | 3 | v Notts | Uxbridge | draw | 11 Jul 2012 | First-class | |
| 232 | 80.4 | 2.87 | 2 | v Surrey | The Oval | lost | 15 Aug 2012 | First-class | |
| 230 | 72.5 | 3.15 | 2 | v Lancashire | Liverpool | draw | 23 May 2012 | First-class | |
| 211 | 68.3 | 3.08 | 3 | v Sussex | Hove | lost | 10 Aug 2012 | First-class | |
| 205/5 | 45.1 | 4.53 | 4 | v Worcs | Worcester | won | 28 Aug 2012 | First-class | |
| 188 | 57.4 | 3.26 | 1 | v Durham | Lord's | draw | 19 Apr 2012 | First-class | |
| 185 | 68.1 | 2.71 | 2 | v Durham | Chester-le-Street | lost | 27 Jul 2012 | First-class | |
| 181/6d | 57.0 | 3.17 | 3 | v Warwickshire | Uxbridge | draw | 1 Aug 2012 | First-class | |
| 179 | 60.5 | 2.94 | 3 | v Durham | Lord's | draw | 19 Apr 2012 | First-class | |
| 175 | 72.1 | 2.42 | 3 | v Somerset | Taunton | lost | 5 Apr 2012 | First-class | |
| 170 | 57.0 | 2.98 | 1 | v Sussex | Hove | lost | 10 Aug 2012 | First-class | |
| 106 | 34.5 | 3.04 | 3 | v Surrey | Lord's | won | 12 Apr 2012 | First-class | |
| 102 | 42.1 | 2.41 | 4 | v Durham | Chester-le-Street | lost | 27 Jul 2012 | First-class | |
| 98 | 35.4 | 2.74 | 1 | v Notts | Uxbridge | draw | 11 Jul 2012 | First-class | |
| 87/0 | 35.0 | 2.48 | 4 | v Notts | Nottingham | draw | 9 May 2012 | First-class | |
| 19/0 | 3.5 | 4.95 | 4 | v Sussex | Lord's | won | 30 May 2012 | First-class | |
| forfeited | 0.0 | - | 3 | v Worcs | Lord's | won | 3 May 2012 | First-class |
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