| 1991 WNBL season | |
|---|---|
| League | Women's National Basketball League (WNBL) |
| Sport | Basketball |
| Number of teams | 12 |
| TV partner(s) | ABC |
| Regular season | |
| Top seed | Hobart Islanders |
| Season MVP | Joanne Metcalfe (Melbourne Tigers) |
| Top scorer | Joanne Metcalfe (Melbourne Tigers) |
| Finals | |
| Champions | Hobart Islanders |
| Runners-up | Nunawading Spectres |
| Finals MVP | Robyn Maher (Hobart Islanders) |
The 1991 WNBL season was the 11th season of competition since the league's establishment in 1981. A total of 12 teams contested the league.