Winston Glacier (53°9′S 73°38′E) is a glacier flowing to Winston Lagoon on the southeast side of Heard Island in the southern Indian Ocean. Its terminus is at Winston Lagoon, between Cape Lockyer and Oatt Rocks. To the northeast of Winston Glacier is Stephenson Glacier, whose terminus is located between Dovers Moraine and Stephenson Lagoon. To the southwest of Winston Glacier is Fiftyone Glacier, whose terminus is located between Lavett Bluff and Lambeth Bluff.