Results
| Championship Playoffs - Round 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Sat | 30 Apr 1966 | Bradford N. | 7 | 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 | ||