| Torcon II, the 31st World Science Fiction Convention | |
| Dates: | 31 August–3 September 1973 |
| Filing: | non-profit |
| Attendance: | ~2,900 |
The 31st World Science Fiction Convention (Worldcon), also known as Torcon II, was held on 31 August–3 September 1973 at the Royal York Hotel in Toronto, Ontario, Canada.
The chairman was John Millard.
Attendance was approximately 2,900.
The 31st Worldcon was the first one in which the John W. Campbell Award for Best New Writer was awarded.