Bigo Bay is a bay 8nmi long and 6nmi wide, indenting the west coast of Graham Land between Cape Garcia and Magnier Peninsula surmounted by the Magnier Peaks and Lisiya Ridge.
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 the Magnier Peaks separates this bay from Leroux Bay. It was named by John Rymill after Mount Bigo, a mountain at the head of the bay.