Nasaussap Saqqaa (old spelling: Nasaussap Sarqâ, Danish: Ussing Isfjord) is a fjord in the Qaasuitsup municipality in northwestern Greenland.
The 29.8 km (18.5 mi) long fjord is an inlet of Sugar Loaf Bay, flowing to the west-north-west between Qullikorsuit Island in the southwest, and the Amitsorsuaq and Nasaussaq islands in the north. Ussing Glacier drains the Greenland ice sheet into the head of the fjord.[1] The shores of Nasaussap Saqqaa are uninhabited; the closest settlement is Nuussuaq on a peninsula of the same name, 26.5 km (16.5 mi) to the northwest of the fjord mouth.