66th World Science Fiction Convention
| Denvention 3, the 66th World Science Fiction Convention | |
|---|---|
| Genre | Science fiction | 
| Dates | 6–10 August 2008 | 
| Venue | Colorado Convention Center | 
| Location(s) | Denver, Colorado | 
| Country | United States | 
| Attendance | 3,751 | 
| Filing status | non-profit | 
| Website | fanac.org/Denvention3 | 
The 66th World Science Fiction Convention (Worldcon), also known as Denvention 3, was held on 6–10 August 2008 at the Colorado Convention Center and the Sheraton Denver Downtown Hotel in Denver, Colorado, United States.
The organizing committee was chaired by Kent Bloom.