Trummer is an uninhabited island in the River Fergus in County Clare, Ireland. It is located between Deer Island and Coney Island.
  Trummer Island | |
| Geography | |
|---|---|
| Location | River Fergus |
| Coordinates | 52°42′18″N 9°01′55″W / 52.705°N 9.032°W |
| Administration | |
| Province | Munster |
| County | Clare |
| Demographics | |
| Population | 0 |
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