Dùn Galláin (English: Fort of the Strangers) is a promontory fort located on the Inner Hebridean island of Colonsay, Scotland.
The site is located at grid reference NR34879314.
[1] The fort overlooks the natural harbours of Tobar Fuar and Port Lobh.
A battle between the islands inhabitants and invaders at Traigh an Tobair Fhuair took place to the north of Dùn Galláin.