Round 3
| Date | Winner | Score | Loser | Score | Venue |
|---|---|---|---|---|---|
| 12/04/78 | Newtown | 13 | Canterbury | 4 | Leichhardt Oval |
| 19/04/78 | Wests | 25 | Brisbane Souths | 5 | Leichhardt Oval |
| 26/04/78 | Brisbane Wests | 4 | Redcliffe | 3 | Lang Park |
| 3/05/78 | Riverina | 36 | Penrith | 2 | Wagga Wagga |
| 10/05/78 | Cronulla | 57 | Newcastle | 5 | Leichhardt Oval |
| 24/05/78 | Illawarra | 44 | Brisbane Norths | 5 | Wollongong |
| 31/05/78 | South Sydney | 9 | Northern Division | 5 | Tamworth |
| 14/06/78 | North Sydney | 46 | North Coast | 3 | Coffs Harbour |
Read more about this topic: 1978 Amco Cup