Which, granted, puts them in plentiful if not good company, but still:
Believe me, I am used to people assuming that South Dakota is in the south, but I have yet to encounter this strange assumption that it is in Africa...and northeastern Africa at that!
As a public service, I present this handy map that shows the location of South Dakota in relation to Sudan. However, I pulled the illustration from Google Maps, so who knows how much we can trust it.