| NSWRFL Amco Cup | |
|---|---|
| Tournament details | |
| Dates | 15 March - 16 August 1978 |
| Teams | 38 |
| Venue(s) | 16 (in 15 host cities) |
| Final positions | |
| Champions | Eastern Suburbs (2nd title) |
| Runners-up | St. George |
| Tournament statistics | |
| Matches played | 37 |
← 1977 1979 → | |
The 1978 Amco Cup was the 5th edition of the NSWRFL Midweek Knockout Cup, a NSWRFL-organised national club Rugby League tournament between the leading clubs and representative teams from the NSWRFL, the BRL, the CRL, the QRL, the NZRL, Western Australia and the Northern Territory.
A total of 38 teams from across Australia and New Zealand played 37 matches in a straight knock-out format, with the matches being held midweek during the premiership season.