Round 1
| Date | Winner | Score | Loser | Score | Venue |
|---|---|---|---|---|---|
| 2/04/80 | Eastern Suburbs Roosters | 14 | Brisbane | 4 | Lang Park |
| 9/04/80 | St. George Dragons | 16 | Balmain Tigers | 5 | Leichhardt Oval |
| 16/04/80 | Newtown Jets | 22 | Manly-Warringah Sea Eagles | 7 | Leichhardt Oval |
| 23/04/80 | Penrith Panthers | 26 | Cronulla-Sutherland Sharks | 14 | Leichhardt Oval |
| 30/04/80 | Parramatta Eels | 20 | South Sydney Rabbitohs | 7 | Leichhardt Oval |
| 7/05/80 | Western Suburbs Magpies | 40 | Auckland | 14 | Leichhardt Oval |
| 21/05/80 | Canterbury-Bankstown Bulldogs | 35 | Country NSW | 3 | Leichhardt Oval |
| 28/05/80 | North Sydney Bears | 40 | Country QLD | 5 | Leichhardt Oval |
Read more about this topic: 1980 Tooth Cup