title: Castle Island
text: # Castle Island
  
  Castle Island may refer to:
  
  ## Bermuda
  
  * Castle Island, Bermuda, one of the islands of Castle Harbour, Bermuda
     * Castle Islands Fortifications, Bermuda
  
  ## Canada
  
  * Castle Island, Alberta
  * Castle Island, Manitounuk Islands, Nunavut
  
  ## Greenland
  
  * Castle Island (Greenland), an island in Sherard Osborn Fjord
  
  ## Ireland
  
  * Castle Island (County Cork), and uninhabited island in Roaringwater Bay (51.507518N, 9.504267W)
  * Castle Island (County Roscommon), an island in Lough Key
  * Castleisland, a town in County Kerry, Ireland
  
  ## New Zealand
  
  * Castle Island, New Zealand
  
  ## United Kingdom
  
  * Castle Island, County Down, a townland in County Down, Northern Ireland
  * Castle Island, County Antrim, a townland in County Antrim, Northern Ireland
  * Castle Island, Scotland
  
  ## United States
  
  * Castle Island (Massachusetts), an island in Boston Harbor
  * Castle Island (New York), formerly an island in the Hudson River currently part of the Port of Albany-Rensselaer in Albany, New York
  * Castle Island (Washington), one of the San Juan Islands
  