NASFiC is the North American Science Fiction Convention. A NASFiC is held only in years when the World Science Fiction Convention (Worldcon) is held outside of North America. For this purpose, “North America” includes the United States of America (including Hawaii) and Canada, as well as the other countries and territories that make up the continent of North America.

NASFiC is chartered by the World Science Fiction Society (WSFS), and the rules for selecting and operating a NASFiC are in the WSFS Constitution.