Bigo Bay () is a bay 8 miles (13 km) long and 6 miles (10 km) wide, indenting the west coast of Graham Land between Cape Garcia and the peninsula surmounted by Magnier Peaks. The French Antarctic Expedition, 1908–10, first sighted this bay but charted it as the southern part of Leroux Bay. The British Graham Land Expedition, 1934–37, determined that the peninsula surmounted by Magnier Peaks separates this bay from Leroux Bay. It was named by Rymill after Mount Bigo, a mountain at the head of the bay.