Castleboy may refer to:
- Castleboy Tower, a folly in County Galway, Ireland
- Castleboy Preceptory, of the Knights Hospitaller, in County Down, Northern Ireland; see List of monastic houses in County Down
- Castleboy (civil parish), parish and townland in County Down, Northern Ireland
- A townland in County Galway, Ireland; List of townlands of County Galway
- Two townlands in County Meath, Ireland; see List of townlands of County Meath
This disambiguation page lists articles associated with the title Castleboy.
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