13th World Science Fiction Convention

Clevention, the 13th World Science Fiction Convention
GenreScience fiction
Dates2–5 September 1955
VenueManger Hotel
Location(s)Cleveland, Ohio
CountryUnited States
Attendance~380
Filing statusnon-profit

The 13th World Science Fiction Convention (Worldcon), also known as Clevention, was held on 2–5 September 1955 at the Manger Hotel in Cleveland, Ohio, United States.

The chairmen were Nick and Noreen Falasca. The guests of honor were Isaac Asimov (pro) and Sam Moskowitz (mystery GoH).