| Greater Mackellar Island | |
| Map: | Antarctica |
| Location: | Antarctica |
| Coordinates: | -66.9667°N 181°W |
| Length Km: | 1.1 |
| Width Km: | 0.5 |
| Population: | Uninhabited |
| Country: | None |
| Treaty System: | Antarctic Treaty System |
Greater Mackellar Island, also Great Mackellar Islet, is the largest of the Mackellar Islands, lying 20NaN0 north of Cape Denison in the center of Commonwealth Bay, Antarctica. It was discovered and named by the Australasian Antarctic Expedition (1911–14) under Douglas Mawson. The Island is about 1100 m long, and up to 500 m wide.[1]
The island forms part of the Mackellar Islands Important Bird Area (IBA), identified as such by BirdLife International because it supports large breeding colonies of Adélie penguins.[2]
