Eorsa lies in Loch na Keal on the west coast of the Isle of Mull, to the east of Ulva and is part of the Loch Na Keal National Scenic Area, one of 40 in Scotland.
In World War I Eorsa was used as a British naval anchorage.
- Area: 122 hectares (0.47 square miles)
- Elevation: 98m (322 feet)
- Population: 0
- Latitude: 56°28’0.02″
- Longitude: -6°4’59.99″