Rathdown Castle
| Rathdown Castle | |
|---|---|
| Native name Ráth Oinn (Irish) | |
| Rath-oinn | |
| Type | Castle |
| Location | Rathdown Upper, Greystones, County Wicklow, Ireland |
| Coordinates | 53°09′30″N 6°04′28″W / 53.158228°N 6.074427°W |
| Built | 13th century; rebuilt after 1308 |
| Architectural style(s) | Norman |
Rathdown Castle is a ruined castle and ancient settlement site located in County Wicklow, Ireland.