| Halmahera Sea | |
|---|---|
| Laut Halmahera (Indonesian) | |
 Location of the Halmahera Sea within Southeast Asia | |
  Halmahera Sea | |
| Coordinates | 1°S 129°E / 1°S 129°E |
| Type | Sea |
| Basin countries | Indonesia |
| Surface area | 95,000 km2 (37,000 sq mi) |
The Halmahera Sea is a regional sea located in the central eastern part of the Australasian Mediterranean Sea. It is centered at about 1°S and 129°E and is bordered by the Pacific Ocean to the north, Halmahera to the west, Waigeo and West Papua to the east, and the Seram Sea to the south. It covers about 95,000 km (59,000 mi) and its topography comprises a number of separate basins and ridges, the chief of which is the Halmahera Basin reaching a depth of 2039 m.
