23rd World Science Fiction Convention

The 23rd World Science Fiction Convention (Worldcon), also known as Loncon II, was held on 27–30 August 1965 at the Mount Royal Hotel in London, United Kingdom. It was the second Worldcon to be held in London, following the original Loncon in 1957.

The chairman was Ella Parker.

Participants
Attendance was approximately 350.

Guests of Honour

 * Brian W. Aldiss
 * Tom Boardman (toastmaster)

1965 Hugo Awards

 * Best Novel: The Wanderer by Fritz Leiber
 * Best Short Story: "Soldier, Ask Not" by Gordon R. Dickson
 * Best Dramatic Presentation: Dr. Strangelove
 * Best Professional Artist: John Schoenherr
 * Best Professional Magazine: Analog
 * Best Fanzine: Yandro edited by Robert and Juanita Coulson
 * Publisher: Ballantine Books