Dreatin Glacier (Bulgarian: ледник Дреатин, ‘Lednik Dreatin’ \'led-nik dre-a-'tin\) is the 12 km long and 7.5 km wide glacier on the northeast side of Detroit Plateau on Trinity Peninsula in Graham Land, Antarctica. It lies southwest of Znepole Ice Piedmont and north of Aitkenhead Glacier, draining the area southwest of Mount Bradley and north of Tufft Nunatak, and flowing southeastwards into Prince Gustav Channel, Weddell Sea.
The glacier is named after the settlement of Dreatin in Western Bulgaria.
Dreatin Glacier is centred at . German-British mapping in 1996.
This article includes information from the Antarctic Place-names Commission of Bulgaria which is used with permission.