User blog comment:AYET/Yonko Territorial Claim/@comment-4889755-20130523025735

I think Yonko just pick islands that ould help them/ they just like and tell the people "This is my territory, anybody messes with you you come get me."(Of course, im a bit curious if Big Mom would do that)

So the territories are sprinkled across the New World, and I think the Red Hair guys might have territory on a couple islands. Maybe.

But, I think BB, Big Mom and Kaido are probally constantly fighting for big name islands in the new World, since they all seem like power hungry people.