The 64th World Science Fiction Convention (Worldcon), styled L.A.con IV, was held in Anaheim, California, United States, from August 23-27, 2006. The venue for the 64th Worldcon was the Anaheim Convention Center and the nearby Hilton and Marriott hotels. The organizing committee was chaired by Christian B. McGuire.The total registered membership of the convention, based on preliminary post-con data reported by the committee, was 6,832, of which 5,913 physically attended.