Nuup Kangerlua[1] is a 160 km (99.4 mi) long fjord[2] in the Sermersooq municipality in southwestern Greenland.

It was formerly known by its colonial name as Godthaab Fjord (Danish: Godthåbsfjorden), Gilbert Sound[3] and Baal's River.

[4] Located by the island's capital, Nuuk, it is the longest fjord on the Labrador Sea coast of Greenland, and one of the longest in the inhabited part of the country.

[5] The fjord widens into a bay dotted with skerries near its mouth, opening into Labrador Sea at approximately 64°03′N 51°58′W / 64.050°N 51.967°W / 64.050; -51.967, near the former Kangeq settlement.

Kapisillit (Lakskaj) is located 75 km (47 mi) northeast of Nuuk, near the head of Kapisillit Kangerluaq,[5] one of the tributary fjords of Nuup Kangerlua.