| 271 runs | North Down v Ballymena | The Green, Comber | misc317503 |
| 175 runs | North Down v Church of Ireland Young Men's Society | The Green, Comber | misc317538 |
| 135 runs | North Down v Church of Ireland Young Men's Society | Circular Road, Belfast | misc317561 |
| 132 runs | Waringstown v Civil Service North | Civil Service Cricket Club, Stormont, Belfast | misc317560 |
| 127 runs | North Down v Lisburn | Wallace Park, Lisburn | misc317476 |
| 108 runs | North Down v Downpatrick | The Green, Comber | misc317497 |
| 107 runs | North Down v Instonians | Instonians Cricket Club, Shaw's Bridge Lower Ground, Belfast | misc317523 |
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