Port Ellen (Scottish Gaelic: Port Ìlein) is a small town on the island of Islay, in Argyll, Scotland. The town is named after the wife of the founder, Frederick Campbell of Islay. Its previous name, Leòdamas, is derived from old Norse meaning "Leòd's Harbour".Port Ellen is built around Leodamais Bay, Islay's main deep water harbour. It is the largest town on Islay, only slightly larger than Bowmore and provides the main ferry connection between Islay and the mainland, at Kennacraig.