| Geography | |
|---|---|
| Location | River Fergus |
| Coordinates | 52°42′00″N 9°02′00″W / 52.7°N 9.033333°WCoordinates: 52°42′00″N 9°02′00″W / 52.7°N 9.033333°W |
| Administration | |
| Province | Munster |
| County | Clare |
| Demographics | |
| Population | 0 |
Trummer is an uninhabited island in the River Fergus in County Clare located between Deer Island and , Ireland.