27th World Science Fiction Convention

St. Louiscon, the 27th World Science Fiction Convention
GenreScience fiction
Dates28 August–1 September 1969
VenueChase Park Plaza Hotel
Location(s)St. Louis, Missouri
CountryUnited States
Attendance1,534
Organized byOzark Science Fiction Association
Filing statusnon-profit

The 27th World Science Fiction Convention (Worldcon), also known as St. Louiscon, was held on 28 August–1 September 1969 at the Chase Park Plaza Hotel in St. Louis, Missouri, United States.

The chairpersons were Ray Fisher and Joyce Fisher. The supporting organization was OSFA, the Ozark Science Fiction Association.