Thurston Glacier () is a glacier about 15 nautical miles (28 km) long which drains the southeast slopes of Mount Siple on Siple Island. The glacier trends eastward and then east-northeastward to reach the north shore of the island. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy aerial photography, 1959-65. Named by Advisory Committee on Antarctic Names (US-ACAN) for Thomas R. Thurston, United States Antarctic Research Program (USARP) meteorologist at Byrd Station in 1965.