score:5
It depends how you define Dutch speakingβif there's a few expats hanging around that speak Dutch, you could probably include 100+ countries. However, Wikipedia has you covered for a list of countries where it's an official language, as well as major populations of Dutch speakers.
Upvote:6
While the Wikipedia page @redct referred to which shows the distribution, I'd be careful - as some of those are not the Dutch spoken in the Netherlands (eg Afrikaans). I can speak some Afrikaans and as a result understand some Dutch, but it's not totally the same.
There's another wiki page which lists the 8 countries that officially speak Dutch, which doesn't have the detail of the previous page, but simpler to quickly parse ;).