| NSWRFL Tooth Cup | |
|---|---|
| Tournament details | |
| Dates | 18 March - 12 August 1981 |
| Teams | 16 |
| Venue(s) | 3 (in 3 host cities) |
| Final positions | |
| Champions | South Sydney (1st title) |
| Runners-up | Cronulla-Sutherland |
| Tournament statistics | |
| Matches played | 23 |
← 1980 1982 → | |
The 1981 Tooth Cup was the 8th edition of the NSWRFL Midweek 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 and the NZRL.
16 teams from across Australia and New Zealand played 23 matches in a round-robin format, with teams playing 2 games each. The top 8 teams advanced to a knockout stage, with the matches being held midweek during the premiership season.