| Philcon II, the 11th World Science Fiction Convention | |
| Dates: | 5–7 September 1953 |
| Filing: | non-profit |
| Attendance: | ~750 |
The 11th World Science Fiction Convention (Worldcon), also known as Philcon II, was held on 5–7 September 1953 at the Bellevue-Stratford Hotel in Philadelphia, Pennsylvania, United States. It was the first Worldcon to present the Hugo Awards.
The supporting organization was the Philadelphia Science Fiction Society. The chairman was Milton A. Rothman, replacing the late James A. Williams.
Attendance was approximately 750.
This Worldcon was the first one that awarded Hugo Awards. The next one (the 12th) did not do so, but since the 13th, Hugo Awards have been a permanent fixture of Worldcons.