According to figures from Westercon Registration, 693 members attended Westercon 64 out of 826 total members of all types.
The figures in more detail:
187 at the door
826 total members all types
693 bodies on site
Membership figures include memberships of all types, including single-day memberships, 3 supporting members, 16 children, and 1 non-human animal companion. Our Registrar also points out that these figures are subject to later revision after a more thorough review of the records.