Qulleq, Qutdleq or Kutdlek is an uninhabited island in the King Frederick VI Coast, Sermersooq municipality in southern Greenland.

Qulleq is an irregularly-shaped island that lies off the southeastern coast of Greenland. It is located 5.5 km from the shore off the mouth of the Anorituup Kangerlua fjord, to the north-northeast of Cape Tordenskjold, northeast of Nuuk Point.

Qulleq is the largest and southernmost island of a small offshore archipelago of four main islands, including Qipinnguak close by to the west, Takisoq to the northwest and Qeqertarsuaq to the north. The island's length is 6 kilometres (4 miles) and its maximum width 2.8 kilometres (2 miles).

Qutsigsormiut is an important Paleo-Eskimo archaeological site on Qulleq's southern coast. It is located by a south-facing bay known as Qulleq Sound that forms a sheltered natural harbour.

A LORAN transmitting station was built on the southeastern point of the island and lies now abandoned.

• List of islands of Greenland

• Distribution Map of Archaeological, Historic, Cultural and Ancient Sites sites in Greenland
• New insights on the north-eastern part of the Ketilidian orogen in South-East Greenland