A NASFiC is held in North America in any year where the Worldcon is outside of North America.
Breaking News: Layton, Utah chosen as the site for the 2019 NASFiC.
As Wellington, New Zealand, has been selected to host the 2020 Worldcon, members of the 2019 NASFiC will vote on a site for the 2020 NASFiC. (Worldcon sites are selected two years in advance, and NASFiC sites one year in advance.)
See the NASFiC Bids page for information about groups bidding to host the 2020 NASFiC.