Coolavin (Irish Cúl ó bhFionn) is a historical barony in south County Sligo, Ireland.

[1] It was created from the ancient túath of An Corann.

The O'Garas were originally Lords of Coolavin.

They were succeeded by the MacDermotts, a family of the Milesian clans, who still claim their head to be the Prince of Coolavin to this day.

This article related to the geography of County Sligo, Ireland is a stub.