The above Worldcons have been selected. You can buy memberships from their websites.
Because the 2017 Worldcon is outside of North America, there will be a NASFiC in 2017. See the NASFiC web site for additional information.
Upcoming Worldcon Bids
The following groups are bidding to hold the 2019 Worldcon.
A full list of future Worldcon bids can be found here.