3rd World Science Fiction Convention
| Denvention I, the 3rd World Science Fiction Convention | |
|---|---|
| Genre | Science fiction | 
| Dates | 4–6 July 1941 | 
| Venue | Shirley-Savoy Hotel | 
| Location(s) | Denver, Colorado | 
| Country | United States | 
| Attendance | 90 | 
The 3rd World Science Fiction Convention (Worldcon), also known as Denvention I, was held on 4–6 July 1941 at the Shirley-Savoy Hotel in Denver, Colorado, United States.