Scotia Bay is a bay 4 km (2.5 mi) wide, lying immediately east of Mossman Peninsula on the south side of Laurie Island, in the South Orkney Islands of Antarctica. It was discovered and roughly charted in the course of the joint cruise by Captain George Powell and Captain Nathaniel Palmer in 1821. It was surveyed in 1903 by the Scottish National Antarctic Expedition under William Speirs Bruce who named it for the expedition ship Scotia.