Dùn Cholla is a hillfort located on the Inner Hebridean island of Colonsay, Scotland. The site is located at grid reference NR37759150.
According to tradition it was a fort of Colla Uais after being exiled from Ireland in 310. St. Columba established his first church in Scotland in the shadow of Dùn Cholla.
Coordinates: 56°02′40″N 6°12′44″W / 56.04454°N 6.21232°W