| 226 runs | Leicestershire v Northumberland | Osborne Avenue, Jesmond | a12793 |
| 223 runs | Derbyshire v Derbyshire Cricket Board | County Ground, Derby | a12784 |
| 192 runs | Devon v Staffordshire | The Recreation Ground, Torquay | a12725 |
| 165 runs | Middlesex v Somerset | John Walker's Ground, Southgate | a12832 |
| 139 runs | Glamorgan v Dorset | Dean Park, Bournemouth | a12786 |
| 130 runs | Yorkshire v Yorkshire Cricket Board | St George's Road, Harrogate | a12797 |
| 128 runs | Middlesex v Nottinghamshire | Lord's Cricket Ground, St John's Wood | a12791 |
| 110 runs | Dorset v Norfolk | Dean Park, Bournemouth | a12726 |
| 103 runs | Essex v Wales Minor Counties | St Helen's, Swansea | a12795 |