Mount Hallgren () is a mountain, largely ice-covered, with a steep, rocky northern face, situated southwest of the Neumayer Cliffs in the Kirwan Escarpment, Queen Maud Land, Antarctica. It was mapped by Norwegian cartographers from surveys and air photos by the NorwegianâÂÂBritishâÂÂSwedish Antarctic Expedition (1949âÂÂ1952) and additional air photos (1958âÂÂ59), and named for Stig E. Hallgren, a photographer with the expedition.