| McCarthy Island | |
| Pushpin Map: | Antarctica |
| Coordinates: | -54.1667°N -63°W |
| Etymology: | Timothy McCarthy, a seaman on the Endurance |
| Location: | King Haakon Bay, South Georgia Island |
| Area M2: | or |
| Area Ha: | --> |
| Length Km: | 1.852 |
| Width M: | --> |
| Coastline M: | --> |
McCarthy Island is an island, 1nmi long, lying in the entrance to King Haakon Bay on the south side of South Georgia. It was surveyed by the South Georgia Survey in the period 1951–57, and was named by the UK Antarctic Place-Names Committee after Timothy McCarthy, a seaman on the Endurance during the British expedition under Ernest Shackleton, 1914–16. McCarthy accompanied Shackleton in the James Caird from Elephant Island to King Haakon Bay.