| Mariholm | |
| Map: | Antarctica |
| Location: | Antarctica |
| Coordinates: | -60.75°N -87°W |
| Population: | Uninhabited |
| Country: | None |
| Treaty System: | Antarctic Treaty System |
Mariholm is the highest and easternmost island in a small group which lies 0.31NaN1 south of Moe Island in the South Orkney Islands, Antarctica. It was named on a chart based upon a running survey of the South Orkney Islands by Captain Petter Sorlle in 1912–13.