| Castle MacEwan | |
|---|---|
Scottish Gaelic: Caisteal Mhic Eoghainn | |
| Kilfinan, Argyll and Bute, Scotland | |
 Monument on the site of Castle MacEwen | |
  Castle MacEwan | |
| Coordinates | 55°57′49″N 5°20′27″W / 55.963595°N 5.3408348°W |
| Type | Castle |
Castle MacEwen (Scottish Gaelic: Caisteal Mhic Eoghainn) is a ruined fort in Argyll and Bute, Scotland. It is near Kilfinan, on the eastern banks of Loch Fyne, around 5 kilometres (3.1 mi) south of Otter Ferry.