East Ongul Island is an island off of
Antarctica, long, lying immediately east of the northern part of
Ongul Island at the east side of the entrance of
Lutzow-Holm Bay. This island was originally mapped as a part of Ongul Island by Norwegian cartographers who worked from air photos taken by the
Lars Christensen Expedition, 1936–37. A strait separating this island from Ongul Island was discovered in 1957 by the
Japanese Antarctic Research Expedition. They named this small island for its position with relation to Ongul Island.