| Trummer Island | |
| Map: | island of Ireland |
| Location: | River Fergus |
| Coordinates: | 52.705°N -9.032°W |
| Country: | Ireland |
| Country Admin Divisions Title: | Province |
| Country Admin Divisions: | Munster |
| Country Admin Divisions Title 1: | County |
| Country Admin Divisions 1: | Clare |
| Population: | 0 |
Trummer is an uninhabited island in the River Fergus in County Clare, Ireland. It is located between Deer Island and Coney Island.