Isumrud Strait
| Isumrud Strait | |
|---|---|
| Location | Papua New Guinea, Madang Province |
| Coordinates | 4°49′S 145°53′E / 4.82°S 145.88°E |
| Islands | Karkar Island |
Isumrud Strait is the strait separating Karkar Island from mainland New Guinea in Madang Province, Papua New Guinea. It's 500 km from Port Moresby.