Team Highest Innings Totals - Middlesex
Highest totals For Frizzell County Championship Division One, 2003 - Middlesex
Highest totals
Team | Score | Overs | RR | Inns | Opposition | Ground | Result | Match Date | Scorecard |
| 620/7d | 160.4 | 3.85 | 1 | v Leics | Southgate | won | 9 Jul 2003 | First-class | |
| 544 | 164.0 | 3.31 | 2 | v Lancashire | Manchester | draw | 21 Aug 2003 | First-class | |
| 495 | 172.5 | 2.86 | 3 | v Essex | Chelmsford | draw | 18 Apr 2003 | First-class | |
| 407 | 115.0 | 3.53 | 1 | v Kent | Lord's | lost | 13 Aug 2003 | First-class | |
| 392 | 100.0 | 3.92 | 1 | v Sussex | Hove | lost | 5 Sep 2003 | First-class | |
| 385 | 104.3 | 3.68 | 2 | v Surrey | Guildford | draw | 23 Jul 2003 | First-class | |
| 370 | 115.2 | 3.20 | 1 | v Surrey | Lord's | draw | 27 Jun 2003 | First-class | |
| 363 | 121.1 | 2.99 | 1 | v Essex | Lord's | draw | 4 Jun 2003 | First-class | |
| 330/7 | 106.4 | 3.09 | 4 | v Sussex | Lord's | won | 23 Apr 2003 | First-class | |
| 326 | 94.0 | 3.46 | 2 | v Notts | Lord's | draw | 10 Sep 2003 | First-class | |
| 304 | 77.2 | 3.93 | 2 | v Lancashire | Lord's | draw | 9 May 2003 | First-class | |
| 286 | 86.0 | 3.32 | 2 | v Warwickshire | Birmingham | lost | 26 Aug 2003 | First-class | |
| 281/3 | 80.0 | 3.51 | 3 | v Warwickshire | Southgate | draw | 15 Jul 2003 | First-class | |
| 278 | 98.4 | 2.81 | 2 | v Notts | Nottingham | won | 30 Jul 2003 | First-class | |
| 260 | 89.1 | 2.91 | 2 | v Warwickshire | Southgate | draw | 15 Jul 2003 | First-class | |
| 250 | 96.2 | 2.59 | 3 | v Sussex | Hove | lost | 5 Sep 2003 | First-class | |
| 249/4 | 71.3 | 3.48 | 3 | v Kent | Canterbury | draw | 14 May 2003 | First-class | |
| 237/7 | 78.0 | 3.03 | 3 | v Lancashire | Manchester | draw | 21 Aug 2003 | First-class | |
| 221 | 71.4 | 3.08 | 2 | v Kent | Canterbury | draw | 14 May 2003 | First-class | |
| 218/2d | 58.0 | 3.75 | 3 | v Surrey | Lord's | draw | 27 Jun 2003 | First-class | |
| 214 | 59.0 | 3.62 | 1 | v Essex | Chelmsford | draw | 18 Apr 2003 | First-class | |
| 201 | 54.1 | 3.71 | 1 | v Leics | Leicester | draw | 21 May 2003 | First-class | |
| 176/0 | 60.0 | 2.93 | 3 | v Lancashire | Lord's | draw | 9 May 2003 | First-class | |
| 171 | 64.5 | 2.63 | 4 | v Warwickshire | Birmingham | lost | 26 Aug 2003 | First-class | |
| 166/2 | 24.0 | 6.91 | 4 | v Leics | Southgate | won | 9 Jul 2003 | First-class | |
| 165 | 69.2 | 2.37 | 3 | v Kent | Lord's | lost | 13 Aug 2003 | First-class | |
| 146/6 | 50.1 | 2.91 | 4 | v Notts | Nottingham | won | 30 Jul 2003 | First-class | |
| 142/5d | 49.5 | 2.84 | 3 | v Leics | Leicester | draw | 21 May 2003 | First-class | |
| 116 | 48.3 | 2.39 | 2 | v Sussex | Lord's | won | 23 Apr 2003 | First-class |
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