Tunulliarfik Fjord is a fjord in the Kujalleq municipality in southern Greenland. In times of the Norse settlement in southern Greenland, it was known as Eiriksfjord.
There are several small settlements near the shores of the long Tunulliarfik Fjord. Narsarsuaq and Qassiarsuk are located on the opposite sides of the fjord near its head. Further south, the settlement of Igaliku occupies the isthmus of a peninsula bounding the fjord from the south.
Narsaq is a port of call for the Arctic Umiaq Line coastal ship in the summer season. Narsaq Heliport and the international Narsarsuaq Airport operate year-round, with STOL connections to Nuuk, Kangerlussuaq, and Paamiut, and helicopter connections to Alluitsup Paa, Nanortalik, and Qaqortoq. Igaliku and Qassiarsuk can be reached by boat.