The 36th World Science Fiction Convention (Worldcon), also known as IguanaCon II, was held on 30 August–4 September 1978 at the Hyatt Regency Phoenix, Adams House, Phoenix Convention Center, and Phoenix Symphony Hall in Phoenix, Arizona, United States. Despite the name, this was the first "IguanaCon".

The original committee chairman was Greg Brown, who served for the first eighteen months of the convention committee's existence; he was replaced for the final six months prior to the convention and during the convention itself by Tim Kyger. Gary Farber was the de facto vice-chairman as well as director of operations during the convention.

Attendance was approximately 4,700.

The World Science Fiction Society administers and presents the Hugo Awards,^[1] the oldest and most noteworthy award for science fiction. Selection of the recipients is by vote of the Worldcon members. Categories include novels and short fiction, artwork, dramatic presentations, and various professional and fandom activities.^[1][2]

Other awards may be presented at Worldcon at the discretion of the individual convention committee. This has often included the national SF awards of the host country, such as the Japanese Seiun Awards as part of Nippon 2007,^[3] and the Prix Aurora Awards as part of Anticipation in 2009. The Astounding Award for Best New Writer and the Sidewise Award, though not sponsored by the Worldcon, are usually presented, as well as the Chesley Awards, the Prometheus Award, and others.^[3]

• Hugo Award
• Science fiction
• Speculative fiction
• World Science Fiction Society
• Worldcon