Mansergh Wall is an ice-covered cliff, 4 nautical miles (7 km) long, running east–west between Mansergh Snowfield and the head of Errant Glacier in the Churchill Mountains of Antarctica. The cliff rises to over 1,600 metres (5,200 ft) and forms part of the divide between the north–flowing Starshot Glacier system, which includes Mansergh Snowfield, and the Nimrod Glacier system, which includes the south–flowing Errant Glacier.