| Geography | |
|---|---|
| Location | Gulf of Carpentaria |
| Archipelago | Wellesley Islands |
| Major islands | Mornington Island |
| Length | 5 km (3.1 mi) |
| Country | |
|
Australia
|
|
| State | Queensland |
Sydney Island is situated in the Gulf of Carpentaria and is one if the islands of the Wellesley Islands group. It s about 5 kilometres (3.1 mi) long and just to the south of the major island in the group Mornington Island.