Petrel Island (54°2′S 37°17′W / 54.033°S 37.283°W / -54.033; -37.283) is an island 1.2 km (0.75 miles) southwest of Prion Island, lying in the Bay of Isles, South Georgia. First charted in 1912-13 by Robert Cushman Murphy, American naturalist aboard the brig Daisy. Recharted in 1929-30 by DI personnel, who so named it because of its association with Prion Island. Prions have been observed in these islands.

• List of Antarctic and sub-Antarctic islands

 This article incorporates public domain material from "Petrel Island (South Georgia)". Geographic Names Information System. United States Geological Survey.