| 304 runs | Sussex v Ireland | Ormeau, Belfast | a9918 |
| 205 runs | Yorkshire v Nottinghamshire | Headingley, Leeds | a9926 |
| 159 runs | Surrey v Netherlands | The Foster's Oval, Kennington | a9925 |
| 133 runs | Warwickshire v Cornwall | Wheal Eliza, Bethel, St Austell | a9912 |
| 129 runs | Lancashire v Essex | Lord's Cricket Ground, St John's Wood | a10037 |
| 125 runs | Hampshire v Worcestershire | County Ground, New Road, Worcester | a9946 |
| 119 runs | Essex v Devon | County Ground, Chelmsford | a9915 |
| 109 runs | Lancashire v Oxfordshire | The Butts Way, Kingston Blount | a9922 |
| 106 runs | Leicestershire v Berkshire | Grace Road, Leicester | a9919 |
| 102 runs | Middlesex v Cumberland | Edenside, Carlisle | a9913 |
| 100 runs | Essex v Hampshire | County Ground, Southampton | a9982 |