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 Small lagoon on Tubabao Island | |
.svg)  Tubabao Location within the Philippines | |
| Geography | |
|---|---|
| Coordinates | 11°02′42″N 125°41′46″E / 11.045°N 125.696°E |
| Adjacent to | Philippine Sea |
| Administration | |
| Region | Eastern Visayas |
| Province | Eastern Samar |
| Municipality | Guiuan |
Tubabao is an island off the southeastern point of Samar. It is one of the islands comprising the town of Guiuan in the province of Eastern Samar, in east central Philippines. The island is located close to the town centre.
During World War II, the island was part of Leyte-Samar Naval Base, which was utilized by the U.S. Navy.