39th World Science Fiction Convention
| Denvention II, the 39th World Science Fiction Convention | |
|---|---|
| Genre | Science fiction | 
| Dates | 3–7 September 1981 | 
| Venue | Sheraton Denver Downtown Hotel | 
| Location(s) | Denver, Colorado | 
| Country | United States | 
| Attendance | 3,792 | 
| Filing status | non-profit | 
The 39th World Science Fiction Convention (Worldcon), also known as Denvention II, was held on 3–7 September 1981 at the Sheraton Denver Downtown Hotel in Denver, Colorado, United States.
The chairmen were Suzanne Carnival and Don C. Thompson.