西贝柳斯冰川是南极洲的冰川，位于亚历山大一世岛北部，处于斯蒂芬森山西南面16公里，长19公里、宽10公里，最终注入莫扎特山麓冰川，以芬兰作曲家让·西贝柳斯命名。

Sibelius Glacier (69°55′S 70°5′W / 69.917°S 70.083°W / -69.917; -70.083) is a glacier, 12 miles (19 km) long and 6 miles (10 km) wide, flowing south into the Mozart Ice Piedmont 10 miles (16 km) southwest of Mount Stephenson situated in the northern portion of Alexander Island, Antarctica. The glacier was first sighted from the air by the British Graham Land Expedition in 1937. Mapped from air photos taken by the Ronne Antarctic Research Expedition in 1947-48, by Searle of the Falkland Islands Dependencies Survey in 1960. This feature was named by the United Kingdom Antarctic Place-Names Committee for Jean Sibelius (1865-1957), Finnish composer.