The 7th World Science Fiction Convention (Worldcon), also known as Cinvention, was held on 3–5 September 1949 at the Hotel Metropole in Cincinnati, Ohio, United States.

Don Ford carried out the duties of chairman, but was officially Secretary-Treasurer; Charles R. Tanner had the honorary title of chairman.

Participants

Attendance was approximately 190.

Noteworthy attendees included Forrest J. Ackerman, Hannes Bok, Lester del Rey. Vince Hamlin. Sam Moskowitz, Rog Phillips, Milton Rothman, "Doc" Smith, and George O. Smith.

Guests of honor

See also

Preceded by6th World Science Fiction Convention Torcon I in Toronto, Ontario, Canada (1948)List of Worldcons 7th World Science Fiction Convention Cinvention in Cincinnati, Ohio, United States (1949)Succeeded by8th World Science Fiction Convention NorWesCon in Portland, Oregon, United States (1950)