Gilbert Glacier (70°0′S 71°0′W / 70.000°S 71.000°W / -70.000; -71.000) is a glacier about 20 nautical miles (37 km) long flowing south from Nichols Snowfield into Mozart Ice Piedmont, situated in northern Alexander Island, Antarctica.

Photographed from the air by Ronne Antarctic Research Expedition (RARE), 1947–48, and mapped from these photographs by D. Searle of Falkland Islands Dependencies Survey (FIDS), 1960. Named in association with Sullivan Glacier, after Sir William S. Gilbert (1836–1911), the British librettist, by United Kingdom Antarctic Place-Names Committee (UK-APC), 1977.

• List of glaciers in the Antarctic
• Grotto Glacier
• Lennon Glacier
• Yozola Glacier
• Glaciology

• M. Braun, A. Humbert, and A. Moll, Changes of Wilkins Ice Shelf over the past 15 years and inferences on its stability, The Cryosphere, 3, 41–56, 2009 www.the-cryosphere.net/3/41/2009/