There is one place named Blackstone Island in Canada.
All places in the world called "Blackstone Island".
Wellington (4)
Windsor (4)
Centreville (3)
Sidney (3)
Borden (3)
Princeton (3)
Westport (3)
Milton (3)
Richmond (3)
Benton (3)
Saint Andrews (3)
Selkirk (3)
Tracadie (3)
Kingston (3)
Victoria (3)
Havelock (3)
Benton Station (2)
Delisle (2)
Frobisher (2)
Keswick (2)
Marysville (2)
Port Burwell (2)
Saint George (2)
Valleyfield (2)
Badger (2)
Burwash (2)
Clyde River (2)
Elgin (2)
Griffin (2)
Lethbridge (2)