Halifax| 21 | | Odsal | | > | | Sat | 30 Apr 1966 | Castleford | 10 | Hull KR | 13 | | Wheldon Road | | > |
| Sat | 30 Apr 1966 | Leeds | 19 | Huddersfield | 7 | | Headingley | | > |
| Sat | 30 Apr 1966 | St Helens | 35 | Warrington | 7 | | Knowsley | | > |
| Sat | 30 Apr 1966 | Swinton | 43 | Featherstone R. | 2 | | Station Road | | > |
| Sat | 30 Apr 1966 | Wakefield T. | 36 | Hull | 6 | | Belle Vue | | > |
| Sat | 30 Apr 1966 | Wigan | 27 | Widnes | 10 | | Central Park | | > |
| Sat | 30 Apr 1966 | Workington | 6 | Oldham | 7 | | Derwent Park | | > |
| Championship Playoffs - Round 2
|
|---|
| Sat | 07 May 1966 | St Helens | 15 | Oldham | 10 | | Knowsley | | > |
| Sat | 07 May 1966 | Swinton | 2 | Halifax | 33 | | Station Road | | > |
| Sat | 07 May 1966 | Wakefield T. | 9 | Hull KR | 10 | | Belle Vue | | > |
| Sat | 07 May 1966 | Wigan | 22 | Leeds | 5 | | Central Park | | > |
| Championship Playoffs - Semi Final
|
|---|
| Sat | 14 May 1966 | St Helens | 14 | Hull KR | 6 | | Knowsley | | > |
| Sat | 14 May 1966 | Wigan | 12 | Halifax | 25 | | Central Park | | > |
| Championship Playoffs - Final
|
|---|
| Sat | 28 May 1966 | St Helens | 35 | Halifax | 12 | | Station Road | 30,634 | > |