Just a quick note, because I know we have many newer people on these lists: of the Wikimanias to date, not counting Singapore or Krakow, 5 have been in Europe and 10 have not been in Europe, plus 2 virtual/global conferences. The full list can be found here: https://en.wikipedia.org/wiki/Wikimania or here: https://meta.wikimedia.org/wiki/Wikimania#Past_Wikimanias. 

Note that includes the first Wikimania, in Frankfurt, which was originally only planned as a one-off event... before we decided the conference was really cool and should happen again :) 

I don't know of a comprehensive list of regional conferences throughout the years but there have been dozens.... WikiIndaba, Iberoconf, WikiConference North America, WikiArabia, Wikimedia CEE, ESEAP... and many of these have been quite large. Suffice to say, Wikimedians seem to like to get together :) I would like to see the movement keep working on making really excellent virtual events too, as I think there's a lot more to explore in that realm too. 

cheers, 

Phoebe