Simiutaq Island is a 13 km × 10 km (8.1 mi × 6.2 mi) uninhabited island in the Qeqqata municipality in western Greenland, located in the mouth of the long Kangerlussuaq Fjord.

[3] There are several small skerries in the mouth of the fjord, at the southern end of Simiutaq Island.

Simiutaq is not an outlying island; it would have been a continuation of the landmass in the north were it not for the narrow and shallow Amerlunnguaq Strait, which branches to the west off Kangerlussuaq Fjord near the mouth of the latter.

Simiutaq is roughly triangular in shape, mostly hilly, with low undulating plain in the north, and the highest point at 775 m (2,542.7 ft).

The "Cruncher Island" light and radio beacon, commonly referred to as Bluie West Nine (BW-9) during the time of American operation in Greenland during World War II, was a wartime radio communications facility located at 66°03′N 53°36′W / 66.050°N 53.600°W / 66.050; -53.600 (Bluie West 9) on Simiutak Island.