How many places in Australia are called Boundary Island?

There is one place named Boundary Island in Australia.

All places in the world called "Boundary Island".

Location Boundary Island:

• Western Australia

Cities

Hamilton (5)
Kingston (5)
Gladstone (5)
Springfield (4)
Woodstock (4)
Darlington (4)
Rosedale (4)
Richmond (4)
Gordon (4)
Windsor (4)
Newstead (4)
Cremorne (4)
Fitzroy (3)
Hampton (3)
Killarney (3)
Lilydale (3)
Raglan (3)
Sunnyside (3)
Woodford (3)
Longford (3)
Saint Helens (3)
Stanley (3)
Denison (3)
Kensington (3)
Oxley (3)
Winton (3)
Croydon (3)
Kangaroo Flat (3)
Salisbury (3)
Stony Creek (3)