Castletown may refer to: Castle town, a settlement built adjacent to or surrounding a castle Places Australia Castletown, Western Australia, a suburb of the remote town of Esperance Republic of Ireland Castletownroche, County Cork Castletown, County Cork (disambiguation), several townlands and villages Castletown, County Laois Castletown, County Limerick, a civil parish in County Limerick Castletown House, County Kildare Castletownbere, County Cork Castletown-Geoghegan, County Westmeath Castletown, County Wexford Castletown Kilpatrick, County Meath; see C. Y. O'Connor Isle of Man Castletown, Isle of Man United Kingdom Castletown, Cheshire Castletown, Dorset Castletown, Highland, Scotland Castletown, Penrith, Cumbria Castletown, County Antrim, a townland in Islandmagee, County Antrim, Northern Ireland Castletown, County Tyrone, a townland in Carnteel parish, County Tyrone, Northern Ireland Castletown, Sunderland RAF Castletown, Scotland Other uses Castletown (horse), a New Zealand Thoroughbred racehorse Castletown, County Mayo, the fictional setting of the mockumentary Hardy Bucks See also Castleton (disambiguation)