First-class Bowling for Middlesex in 1991 County Championship
| Name | Balls | Mdns | Runs | Wkts | BB | Ave | 5wI | 10wM |
| AA Barnett | 646 | 23 | 329 | 10 | 4-119 | 32.90 | 0 | 0 |
| KR Brown | 18 | 0 | 17 | 1 | 1-17 | 17.00 | 0 | 0 |
| NG Cowans | 2912 | 121 | 1370 | 34 | 4-42 | 40.29 | 0 | 0 |
| RM Ellcock | 300 | 9 | 189 | 7 | 4-60 | 27.00 | 0 | 0 |
| JE Emburey | 5093 | 228 | 2031 | 64 | 7-71 | 31.73 | 1 | 0 |
| P Farbrace | 25 | 0 | 64 | 1 | 1-64 | 64.00 | 0 | 0 |
| ARC Fraser | 239 | 12 | 91 | 6 | 4-24 | 15.16 | 0 | 0 |
| MW Gatting | 168 | 4 | 90 | 0 | ||||
| DW Headley | 1856 | 44 | 1180 | 28 | 5-46 | 42.14 | 2 | 0 |
| SP Hughes | 425 | 14 | 270 | 5 | 2-44 | 54.00 | 0 | 0 |
| IJF Hutchinson | 36 | 0 | 11 | 0 | ||||
| M Keech | 66 | 6 | 16 | 0 | ||||
| MR Ramprakash | 30 | 1 | 25 | 1 | 1-0 | 25.00 | 0 | 0 |
| MA Roseberry | 54 | 1 | 36 | 0 | ||||
| SA Sylvester | 120 | 2 | 98 | 0 | ||||
| CW Taylor | 882 | 30 | 480 | 18 | 3-35 | 26.66 | 0 | 0 |
| PCR Tufnell | 4402 | 199 | 1818 | 70 | 7-116 | 25.97 | 5 | 1 |
| PN Weekes | 340 | 12 | 188 | 7 | 3-57 | 26.85 | 0 | 0 |
| NF Williams | 2864 | 89 | 1474 | 41 | 5-89 | 35.95 | 1 | 0 |
