Cadman Glacier () is a glacier, 1.5 miles (2.4 km) wide at its mouth and about 7 miles (11 km) long, flowing northwestward into the head of the southern arm of Beascochea Bay on the west side of the Antarctic Peninsula. It was discovered and roughly surveyed in 1909 by the French Antarctic Expedition under Jean-Baptiste Charcot. It was surveyed in 1935 by the British Graham Land Expedition (BGLE), led by John Rymill, and later named for John Cadman, 1st Baron Cadman of Silverdale, who contributed toward the cost of the BGLE, 1934–37.