Wellington, New Zealand, has been selected as the site for the 2020 Worldcon. The New Zealand bid received 643 votes of the 726 votes cast. There were no other official candidates.
The convention will be called CoNZealand. The dates will be July 29 to August 2. George R.R. Martin has been announced as the Master of Ceremonies. Further information is available from the convention website.
San José, California will be the site of the 2018 Worldcon (Worldcon 76). In the site selection vote at MidAmeriCon II San José beat a bid from New Orleans by 675 votes to 594.
The convention will take place at the McEnery Convention Center in San José, which was also the site of the 2002 Worldcon (ConJosé). The dates are August 16-20, 2018. The Guests of Honor will include Chelsea Quinn Yarbro and Spider Robinson. For further details of the convention see their website.
For full details of the voting, including the daily breakdowns, see the 2018 Worldcon Site Selection Tally.