| 191 runs | Somerset v Derbyshire | The Cooper Associates County Ground, Taunton | tt11106 |
| 144 runs | Warwickshire v Worcestershire | Edgbaston, Birmingham | tt11031 |
| 125 runs | Warwickshire v Northamptonshire | Edgbaston, Birmingham | tt10830 |
| 104 runs | Hampshire v Warwickshire | Edgbaston, Birmingham | tt11092 |
| 94 runs | Nottinghamshire v Derbyshire | Trent Bridge, Nottingham | tt11019 |
| 87 runs | Lancashire v Nottinghamshire | Trent Bridge, Nottingham | tt10876 |
| 73 runs | Northamptonshire v Worcestershire | County Ground, Northampton | tt10941 |
| 72 runs | Surrey v Hampshire | The Kia Oval, Kennington | tt10891 |
| 70 runs | Derbyshire v Leicestershire | Uptonsteel County Ground, Leicester | tt10852 |
| 69 runs | Essex v Glamorgan | The Cloud County Ground, Chelmsford | tt11065 |
| 65 runs | Yorkshire v Durham | Seat Unique Riverside Ground, Chester-le-Street | tt10990 |
| 62 runs | Yorkshire v Northamptonshire | County Ground, Northampton | tt11030 |
| 61 runs | Essex v Middlesex | The Cloud County Ground, Chelmsford | tt10951 |
| 60 runs | Leicestershire v Yorkshire | Uptonsteel County Ground, Leicester | tt11076 |
| 55 runs | Kent v Middlesex | Spitfire Ground, St Lawrence, Canterbury | tt10908 |
| 55 runs | Warwickshire v Nottinghamshire | Trent Bridge, Nottingham | tt10995 |
| 54 runs | Durham v Leicestershire | Uptonsteel County Ground, Leicester | tt10827 |
| 54 runs | Hampshire v Kent | The Ageas Bowl, Southampton | tt10992 |
| 51 runs | Leicestershire v Durham | Seat Unique Riverside Ground, Chester-le-Street | tt11004 |
